diff --git a/playwright/url-transport.spec.ts b/playwright/url-transport.spec.ts
index 6400657fe..917d29e77 100644
--- a/playwright/url-transport.spec.ts
+++ b/playwright/url-transport.spec.ts
@@ -54,21 +54,20 @@ const cases: {
     guestFlows: ["cs-api"],
   },
   {
-    // In compatibility mode both publish a membership state event, so both
-    // must keep the legacy participant identity that clients predating MSC4195
-    // expect, which only the JWT service assigns.
+    // Publishers keep the legacy participant identity that clients predating
+    // MSC4195 expect, which only the JWT service assigns.
     hostShape: "both",
     guestShape: "both",
     hostFlows: ["service-legacy"],
     guestFlows: ["service-legacy"],
   },
   {
-    // In Matrix 2.0 mode nobody expects a legacy identity, so the CS API wins.
+    // The MatrixRTC mode has no bearing on the choice.
     hostShape: "both",
     guestShape: "both",
     mode: "2_0",
-    hostFlows: ["cs-api"],
-    guestFlows: ["cs-api"],
+    hostFlows: ["service-legacy"],
+    guestFlows: ["service-legacy"],
   },
   {
     hostShape: "url",
diff --git a/src/livekit/auth/index.test.ts b/src/livekit/auth/index.test.ts
index f16987a34..6c48c5032 100644
--- a/src/livekit/auth/index.test.ts
+++ b/src/livekit/auth/index.test.ts
@@ -21,7 +21,6 @@ import { delegateDelayedLeave, getSFUConfig } from ".";
 import { mocked } from "storybook/test";
 import { ConnectionError, MatrixError } from "matrix-js-sdk";
 import { NoMatrix2AuthorizationService } from "../../utils/errors";
-import { MatrixRTCMode } from "../../config/ConfigOptions";
 import { type CallMembershipIdentityParts } from "matrix-js-sdk/lib/matrixrtc/EncryptionManager";
 
 vi.mock("./openID", () => ({ getSFUConfig: vi.fn() }));
@@ -84,7 +83,6 @@ describe("getSFUConfig", () => {
     membership,
     serverName: "example.org",
     role: "subscriber" as const,
-    matrixRTCMode: MatrixRTCMode.Matrix_2_0,
     roomId,
     slotId,
     logger,
@@ -186,12 +184,24 @@ describe("getSFUConfig", () => {
     expect(openID.getSFUConfig).not.toHaveBeenCalled();
   });
 
+  it("uses CS API when publishing with url transport", async () => {
+    expect(
+      await getSFUConfig({
+        ...defaultParams,
+        transport: urlTransport,
+        role: "publisher",
+      }),
+    ).toEqual(expect.objectContaining({ jwt: csApiJWTToken }));
+    expect(client._unstable_getLivekitToken).toHaveBeenCalled();
+    expect(openID.getSFUConfig).not.toHaveBeenCalled();
+  });
+
   it("does not fall back to OpenID when publishing", async () => {
     client._unstable_getLivekitToken.mockRejectedValueOnce(unsupportedError);
     await expect(
       getSFUConfig({
         ...defaultParams,
-        transport: urlAndServiceUrlTransport,
+        transport: urlTransport,
         role: "publisher",
       }),
     ).rejects.toThrow(expect.any(NoMatrix2AuthorizationService));
@@ -199,7 +209,7 @@ describe("getSFUConfig", () => {
     expect(openID.getSFUConfig).not.toHaveBeenCalled();
   });
 
-  it("uses OpenID when publishing in compatibility mode with url + livekit_service_url transport", async () => {
+  it("uses OpenID when publishing with url + livekit_service_url transport", async () => {
     // Subscribers predating MSC4195 expect a legacy participant identity from
     // anyone advertising a state event, which only the JWT service assigns
     expect(
@@ -207,7 +217,6 @@ describe("getSFUConfig", () => {
         ...defaultParams,
         transport: urlAndServiceUrlTransport,
         role: "publisher",
-        matrixRTCMode: MatrixRTCMode.Compatibility,
       }),
     ).toEqual(
       expect.objectContaining({
@@ -221,31 +230,6 @@ describe("getSFUConfig", () => {
     );
   });
 
-  it("uses CS API when publishing in compatibility mode with url transport", async () => {
-    expect(
-      await getSFUConfig({
-        ...defaultParams,
-        transport: urlTransport,
-        role: "publisher",
-        matrixRTCMode: MatrixRTCMode.Compatibility,
-      }),
-    ).toEqual(expect.objectContaining({ jwt: csApiJWTToken }));
-    expect(client._unstable_getLivekitToken).toHaveBeenCalled();
-    expect(openID.getSFUConfig).not.toHaveBeenCalled();
-  });
-
-  it("uses CS API when subscribing in compatibility mode with url + livekit_service_url transport", async () => {
-    expect(
-      await getSFUConfig({
-        ...defaultParams,
-        transport: urlAndServiceUrlTransport,
-        matrixRTCMode: MatrixRTCMode.Compatibility,
-      }),
-    ).toEqual(expect.objectContaining({ jwt: csApiJWTToken }));
-    expect(client._unstable_getLivekitToken).toHaveBeenCalled();
-    expect(openID.getSFUConfig).not.toHaveBeenCalled();
-  });
-
   it("does not fall back to OpenID on connection error", async () => {
     const client_ = {
       ...client,
@@ -275,7 +259,6 @@ describe("delegateDelayedLeave", () => {
     roomId,
     slotId,
     delayId: "delay123",
-    matrixRTCMode: MatrixRTCMode.Matrix_2_0,
     logger,
   };
 
@@ -305,21 +288,11 @@ describe("delegateDelayedLeave", () => {
     expect(openID.getSFUConfig).toHaveBeenCalled();
   });
 
-  it("uses CS API with url + livekit_service_url transport", async () => {
-    await delegateDelayedLeave({
-      ...defaultParams,
-      transport: urlAndServiceUrlTransport,
-    });
-    expect(client._unstable_delegateDelayedLeave).toHaveBeenCalled();
-    expect(openID.getSFUConfig).not.toHaveBeenCalled();
-  });
-
-  it("uses OpenID in compatibility mode with url + livekit_service_url transport", async () => {
+  it("uses OpenID with url + livekit_service_url transport", async () => {
     // Must match the flow that got the token, so the identities line up
     await delegateDelayedLeave({
       ...defaultParams,
       transport: urlAndServiceUrlTransport,
-      matrixRTCMode: MatrixRTCMode.Compatibility,
     });
     expect(client._unstable_delegateDelayedLeave).not.toHaveBeenCalled();
     expect(openID.getSFUConfig).toHaveBeenCalledWith(
@@ -330,18 +303,4 @@ describe("delegateDelayedLeave", () => {
       }),
     );
   });
-
-  it("does not fall back to OpenID with url + livekit_service_url transport", async () => {
-    client._unstable_delegateDelayedLeave.mockRejectedValueOnce(
-      unsupportedError,
-    );
-    await expect(
-      delegateDelayedLeave({
-        ...defaultParams,
-        transport: urlAndServiceUrlTransport,
-      }),
-    ).rejects.toThrow();
-    expect(client._unstable_delegateDelayedLeave).toHaveBeenCalled();
-    expect(openID.getSFUConfig).not.toHaveBeenCalled();
-  });
 });
diff --git a/src/livekit/auth/index.ts b/src/livekit/auth/index.ts
index 018347cb3..292dac4d4 100644
--- a/src/livekit/auth/index.ts
+++ b/src/livekit/auth/index.ts
@@ -14,7 +14,6 @@ import * as openID from "./openID";
 import * as csApi from "./csApi";
 import { type SFUConfig } from "./types";
 import { NoMatrix2AuthorizationService } from "../../utils/errors";
-import { MatrixRTCMode } from "../../config/ConfigOptions";
 
 export type { ClientOpenIDParts } from "./openID";
 export type { ClientGetTokenParts, ClientDelegationParts } from "./csApi";
@@ -80,11 +79,6 @@ export interface GetSFUConfigParams {
    * Whether we want to publish or only subscribe on the {@link transport}.
    */
   role: "publisher" | "subscriber";
-  /**
-   * The MatrixRTC mode, which decides the format of our membership event and
-   * so the participant identity a publisher must have.
-   */
-  matrixRTCMode: MatrixRTCMode;
   logger: Logger;
 }
 
@@ -99,7 +93,6 @@ export async function getSFUConfig({
   roomId,
   slotId,
   role,
-  matrixRTCMode,
   logger,
 }: GetSFUConfigParams): Promise<SFUConfig> {
   const viaOpenID = async (serviceUrl: string): Promise<SFUConfig> =>
@@ -113,7 +106,7 @@ export async function getSFUConfig({
       logger,
     });
 
-  const flow = chooseAuthFlow(transport, role, matrixRTCMode);
+  const flow = chooseAuthFlow(transport, role);
   if (flow.kind === "openID") return await viaOpenID(flow.serviceUrl);
 
   try {
@@ -174,10 +167,6 @@ export interface DelegateDelayedLeaveParams {
    * The delay ID of the leave event to be delegated.
    */
   delayId: string;
-  /**
-   * The MatrixRTC mode, which decides the format of our membership event.
-   */
-  matrixRTCMode: MatrixRTCMode;
   logger: Logger;
 }
 
@@ -192,13 +181,12 @@ export async function delegateDelayedLeave({
   roomId,
   slotId,
   delayId,
-  matrixRTCMode,
   logger,
 }: DelegateDelayedLeaveParams): Promise<void> {
   // It's important that we use the same flow (CS API or OpenID) as whatever we
   // would've used to get a JWT token for this transport, since the participant
   // identity computed by the service needs to match.
-  const flow = chooseAuthFlow(transport, "publisher", matrixRTCMode);
+  const flow = chooseAuthFlow(transport, "publisher");
   if (flow.kind === "csApi") {
     try {
       await csApi.delegateDelayedLeave({
@@ -246,25 +234,19 @@ export type AuthFlow =
  *
  * Only the JWT service's `/sfu/get` endpoint assigns the legacy participant
  * identity that clients predating MSC4195 expect from anyone advertising a
- * membership state event, which is what compatibility mode sends. So a
- * publisher in compatibility mode keeps using the JWT service wherever the
- * transport still offers one, even if it also has a `url`. Subscribers may use
- * the CS API regardless, as nobody matches their identity.
+ * membership state event. So a publisher keeps using the JWT service wherever
+ * the transport still offers one, even if it also has a `url`. Subscribers may
+ * use the CS API regardless, as nobody matches their identity.
  * @param transport The transport to authenticate against.
  * @param role Whether we want to publish or only subscribe on the transport.
- * @param matrixRTCMode The MatrixRTC mode, which decides the format of our
- *   membership event.
  */
 export function chooseAuthFlow(
   transport: UnstableLivekitTransport,
   role: "publisher" | "subscriber",
-  matrixRTCMode: MatrixRTCMode,
 ): AuthFlow {
   if ("url" in transport) {
     const useCsApi =
-      !("livekit_service_url" in transport) ||
-      role === "subscriber" ||
-      matrixRTCMode === MatrixRTCMode.Matrix_2_0;
+      !("livekit_service_url" in transport) || role === "subscriber";
     if (useCsApi) return { kind: "csApi", url: transport.url };
   }
   return { kind: "openID", serviceUrl: transport.livekit_service_url };
diff --git a/src/settings/DeveloperSettingsTab.tsx b/src/settings/DeveloperSettingsTab.tsx
index cd21320e1..e31282e81 100644
--- a/src/settings/DeveloperSettingsTab.tsx
+++ b/src/settings/DeveloperSettingsTab.tsx
@@ -531,7 +531,6 @@ export const DeveloperSettingsTab: FC<Props> = ({
                 roomId,
                 slotId: "org.example.fake-slot#room",
                 role: "publisher",
-                matrixRTCMode: effectiveMatrixRTCMode,
                 logger,
               });
               setCustomLivekitUrlUpdateError(null);
@@ -542,13 +541,7 @@ export const DeveloperSettingsTab: FC<Props> = ({
               );
             }
           },
-          [
-            customTransportTextBuffer,
-            setCustomTransport,
-            client,
-            roomId,
-            effectiveMatrixRTCMode,
-          ],
+          [customTransportTextBuffer, setCustomTransport, client, roomId],
         )}
         value={customTransportTextBuffer ?? ""}
         onChange={useCallback(
diff --git a/src/state/CallViewModel/CallViewModel.ts b/src/state/CallViewModel/CallViewModel.ts
index 5821204a1..169abb98c 100644
--- a/src/state/CallViewModel/CallViewModel.ts
+++ b/src/state/CallViewModel/CallViewModel.ts
@@ -575,7 +575,6 @@ export function createCallViewModel$(
       client,
       matrixRoom.roomId,
       matrixRTCSession.slotId,
-      matrixRTCMode,
       mediaDevices,
       trackProcessorState$,
       livekitKeyProvider,
@@ -666,7 +665,6 @@ export function createCallViewModel$(
       ).pipe(map(([delayId]) => delayId ?? null)),
       matrixRTCSession.delayId ?? null,
     ),
-    matrixRTCMode,
     logger: logger.getChild(`[${Date.now()}]`),
   });
 
diff --git a/src/state/CallViewModel/CallViewModelTestUtils.ts b/src/state/CallViewModel/CallViewModelTestUtils.ts
index 6ef3e9f8d..93c190ace 100644
--- a/src/state/CallViewModel/CallViewModelTestUtils.ts
+++ b/src/state/CallViewModel/CallViewModelTestUtils.ts
@@ -230,7 +230,6 @@ export function withCallViewModel(mode: MatrixRTCMode) {
                 client: room.client,
                 roomId: room.roomId,
                 slotId: "m.call#ROOM",
-                matrixRTCMode: mode,
                 livekitRoomFactory,
               },
               logger,
diff --git a/src/state/CallViewModel/localMember/LocalMember.test.ts b/src/state/CallViewModel/localMember/LocalMember.test.ts
index 273b6c8f3..f8b4e6b6b 100644
--- a/src/state/CallViewModel/localMember/LocalMember.test.ts
+++ b/src/state/CallViewModel/localMember/LocalMember.test.ts
@@ -346,27 +346,31 @@ describe("LocalMembership", () => {
     .mockResolvedValue();
   afterEach(() => delegationSpy.mockClear());
 
-  // The transport has both a `url` and a `livekit_service_url`. In Matrix 2.0
-  // mode we publish through the CS API, so the homeserver delegates; in
-  // compatibility mode we publish through the JWT service, so that delegates.
+  const urlOnlyTransport: UnstableLivekitTransport = {
+    type: "livekit",
+    url: "https://sfu.example.org",
+  };
+
+  // With a `url` only we publish through the CS API, so the homeserver
+  // delegates. With a `livekit_service_url` we publish through the JWT
+  // service, so that delegates.
   it.each([
-    ["no", MatrixRTCMode.Compatibility, null, timings],
-    ["no", MatrixRTCMode.Matrix_2_0, null, timings],
+    ["no", mockTransport, null, timings],
     [
       "homeserver",
-      MatrixRTCMode.Matrix_2_0,
+      urlOnlyTransport,
       "https://matrix.example.org/_matrix/client/unstable/io.element.msc4195/rtc/livekit/delegate_delayed_leave",
       delegatedTimings,
     ],
     [
       "transport",
-      MatrixRTCMode.Compatibility,
+      mockTransport,
       "https://jwt.example.org/delegate_delayed_leave",
       delegatedTimings,
     ],
   ])(
-    "joins session with %s delegation support in %s mode",
-    async (_serviceName, matrixRTCMode, delegationUrl, delayedLeaveTimings) => {
+    "joins session with %s delegation support",
+    async (_serviceName, transport, delegationUrl, delayedLeaveTimings) => {
       const scope = testScope();
       const joinMatrixRTC = vi.fn();
       const delayId$ = new BehaviorSubject<string | null>(null);
@@ -375,15 +379,17 @@ describe("LocalMembership", () => {
         fetchMock.post(delegationUrl, () => ({ status: 401, body: {} }));
 
       const connectionMap = new ConnectionMap();
-      connectionMap.add(connectionTransportAConnected, []);
+      connectionMap.add(
+        { ...connectionTransportAConnected, transport } as Connection,
+        [],
+      );
       const localMembership = createLocalMembership$({
         scope,
         ...defaultCreateLocalMemberValues,
         connectionMap$: constant(new Epoch(connectionMap)),
         joinMatrixRTC,
-        localTransport$: constant(mockTransportLocator),
+        localTransport$: constant({ transport, serverName: "example.org" }),
         delayId$,
-        matrixRTCMode,
       });
 
       localMembership.requestJoinAndPublish();
@@ -391,7 +397,7 @@ describe("LocalMembership", () => {
       await flushPromises();
       // Joins with timings appropriate for the level of delegation support
       expect(joinMatrixRTC).toHaveBeenCalledWith(
-        mockTransport,
+        transport,
         delayedLeaveTimings,
       );
 
@@ -407,10 +413,9 @@ describe("LocalMembership", () => {
           expect(delegationSpy).toHaveBeenLastCalledWith({
             client: mockedClient,
             membership: ownMemberMock,
-            transport: mockTransport,
+            transport,
             roomId: "!test-room-id:example.org",
             delayId,
-            matrixRTCMode,
             logger: expect.anything(),
           });
 
diff --git a/src/state/CallViewModel/localMember/LocalMember.ts b/src/state/CallViewModel/localMember/LocalMember.ts
index b4af36b58..baa6b473d 100644
--- a/src/state/CallViewModel/localMember/LocalMember.ts
+++ b/src/state/CallViewModel/localMember/LocalMember.ts
@@ -165,8 +165,6 @@ interface Props {
   hostBridge: HostBridge;
   baseUrl: string;
   delayId$: Behavior<string | null>;
-  /** The MatrixRTC mode, which decides the format of our membership event. */
-  matrixRTCMode: MatrixRTCMode;
   logger: Logger;
 }
 
@@ -214,7 +212,6 @@ export const createLocalMembership$ = ({
   hostBridge,
   ownMembershipIdentity,
   delayId$,
-  matrixRTCMode,
 }: Props): {
   /**
    * This request to start audio and video tracks.
@@ -318,7 +315,7 @@ export const createLocalMembership$ = ({
       switchMap(async ({ transport }) => {
         // Delegation goes through whichever service authenticates us as a
         // publisher, so only that service's support counts
-        const flow = chooseAuthFlow(transport, "publisher", matrixRTCMode);
+        const flow = chooseAuthFlow(transport, "publisher");
         const delegationSupported =
           flow.kind === "openID"
             ? await checkDelegationSupport(
@@ -735,7 +732,6 @@ export const createLocalMembership$ = ({
             slotId: matrixRTCSession.slotId,
             roomId,
             delayId,
-            matrixRTCMode,
             logger,
           });
           logger.info("Delayed leave successfully delegated");
diff --git a/src/state/CallViewModel/remoteMembers/Connection.test.ts b/src/state/CallViewModel/remoteMembers/Connection.test.ts
index 632122a3f..bdab8e7af 100644
--- a/src/state/CallViewModel/remoteMembers/Connection.test.ts
+++ b/src/state/CallViewModel/remoteMembers/Connection.test.ts
@@ -42,7 +42,6 @@ import {
 } from "./Connection.ts";
 import { ObservableScope } from "../../ObservableScope.ts";
 import { FailToGetOpenIdToken } from "../../../utils/errors.ts";
-import { MatrixRTCMode } from "../../../config/ConfigOptions.ts";
 import { testJWTToken } from "../../../utils/test-fixtures.ts";
 import { mockRemoteParticipant, ownMemberMock } from "../../../utils/test.ts";
 import {
@@ -124,7 +123,6 @@ function setupRemoteConnection(): Connection {
     client,
     roomId: ROOM_ID,
     slotId: SLOT_ID,
-    matrixRTCMode: MatrixRTCMode.Matrix_2_0,
     role: "subscriber",
     transport,
     serverName: "m.localhost",
@@ -174,7 +172,6 @@ describe("Start connection states", () => {
       client,
       roomId: ROOM_ID,
       slotId: SLOT_ID,
-      matrixRTCMode: MatrixRTCMode.Matrix_2_0,
       role: "subscriber",
       transport,
       serverName: "m.localhost",
@@ -195,7 +192,6 @@ describe("Start connection states", () => {
       client,
       roomId: ROOM_ID,
       slotId: SLOT_ID,
-      matrixRTCMode: MatrixRTCMode.Matrix_2_0,
       role: "subscriber",
       transport,
       serverName: "m.localhost",
@@ -251,7 +247,6 @@ describe("Start connection states", () => {
       client,
       roomId: ROOM_ID,
       slotId: SLOT_ID,
-      matrixRTCMode: MatrixRTCMode.Matrix_2_0,
       role: "subscriber",
       transport,
       serverName: "m.localhost",
@@ -316,7 +311,6 @@ describe("Start connection states", () => {
       client,
       roomId: ROOM_ID,
       slotId: SLOT_ID,
-      matrixRTCMode: MatrixRTCMode.Matrix_2_0,
       role: "subscriber",
       transport,
       serverName: "m.localhost",
@@ -567,7 +561,6 @@ describe("remote track logging", () => {
         client,
         roomId: ROOM_ID,
         slotId: SLOT_ID,
-        matrixRTCMode: MatrixRTCMode.Matrix_2_0,
         role: "subscriber",
         transport,
         serverName: "m.localhost",
diff --git a/src/state/CallViewModel/remoteMembers/Connection.ts b/src/state/CallViewModel/remoteMembers/Connection.ts
index cbdffcbde..7e94b39f1 100644
--- a/src/state/CallViewModel/remoteMembers/Connection.ts
+++ b/src/state/CallViewModel/remoteMembers/Connection.ts
@@ -44,15 +44,12 @@ import {
   type ClientOpenIDParts,
   type SFUConfig,
 } from "../../../livekit/auth";
-import { type MatrixRTCMode } from "../../../config/ConfigOptions.ts";
 
 export interface ConnectionOpts {
   /** The identity parts to use on this connection */
   ownMembershipIdentity: CallMembershipIdentityParts;
   /** Whether we want to publish or only subscribe on this connection. */
   role: "publisher" | "subscriber";
-  /** The MatrixRTC mode, which decides the format of our membership event. */
-  matrixRTCMode: MatrixRTCMode;
   /** The media transport to connect to. */
   transport: UnstableLivekitTransport;
   /** The name of the homeserver to which the {@link transport} belongs. */
@@ -141,7 +138,6 @@ export class Connection {
   private readonly client: ClientGetTokenParts & ClientOpenIDParts;
   private readonly roomId: string;
   private readonly slotId: string;
-  private readonly matrixRTCMode: MatrixRTCMode;
   private readonly logger: Logger;
   private readonly ownMembershipIdentity: CallMembershipIdentityParts;
   /**
@@ -155,7 +151,6 @@ export class Connection {
     this.ownMembershipIdentity = opts.ownMembershipIdentity;
     this.roomId = opts.roomId;
     this.slotId = opts.slotId;
-    this.matrixRTCMode = opts.matrixRTCMode;
     this.logger = logger.getChild(
       `[Connection ${JSON.stringify(opts.transport)}]`,
     );
@@ -399,7 +394,6 @@ export class Connection {
       serverName: this.serverName,
       roomId: this.roomId,
       slotId: this.slotId,
-      matrixRTCMode: this.matrixRTCMode,
       logger: this.logger,
     });
   }
diff --git a/src/state/CallViewModel/remoteMembers/ConnectionFactory.ts b/src/state/CallViewModel/remoteMembers/ConnectionFactory.ts
index 39ac35706..e5240f096 100644
--- a/src/state/CallViewModel/remoteMembers/ConnectionFactory.ts
+++ b/src/state/CallViewModel/remoteMembers/ConnectionFactory.ts
@@ -39,7 +39,6 @@ import {
   type ClientGetTokenParts,
   type ClientOpenIDParts,
 } from "../../../livekit/auth";
-import { type MatrixRTCMode } from "../../../config/ConfigOptions.ts";
 
 // TODO evaluate if this should be done like the Publisher Factory
 export interface ConnectionFactory {
@@ -62,7 +61,6 @@ export class ECConnectionFactory implements ConnectionFactory {
    * @param client - The OpenID client parts for authentication, needed to get openID and JWT tokens.
    * @param roomId - The ID of the Matrix room in which the session takes place.
    * @param slotId - The ID of the MatrixRTC slot in which the session takes place.
-   * @param matrixRTCMode - The MatrixRTC mode, which decides the format of our membership event.
    * @param devices - Used for video/audio out/in capture options.
    * @param processorState$ - Effects like background blur (only for publishing connection?)
    * @param livekitKeyProvider - Optional key provider for end-to-end encryption.
@@ -73,7 +71,6 @@ export class ECConnectionFactory implements ConnectionFactory {
     private client: ClientGetTokenParts & ClientOpenIDParts,
     private readonly roomId: string,
     private readonly slotId: string,
-    private readonly matrixRTCMode: MatrixRTCMode,
     private devices: MediaDevices,
     private processorState$: Behavior<ProcessorState>,
     livekitKeyProvider: BaseKeyProvider | undefined,
@@ -120,7 +117,6 @@ export class ECConnectionFactory implements ConnectionFactory {
       {
         roomId: this.roomId,
         slotId: this.slotId,
-        matrixRTCMode: this.matrixRTCMode,
         role,
         transport,
         serverName,
diff --git a/src/state/CallViewModel/remoteMembers/ECConnectionFactory.test.ts b/src/state/CallViewModel/remoteMembers/ECConnectionFactory.test.ts
index 0a9310f82..be6c149f4 100644
--- a/src/state/CallViewModel/remoteMembers/ECConnectionFactory.test.ts
+++ b/src/state/CallViewModel/remoteMembers/ECConnectionFactory.test.ts
@@ -36,7 +36,6 @@ import {
   cameraCodec,
 } from "../../../settings/settings.ts";
 import { testJWTToken } from "../../../utils/test-fixtures.ts";
-import { MatrixRTCMode } from "../../../config/ConfigOptions.ts";
 
 // At the top of your test file, after imports
 vi.mock("livekit-client", async (importOriginal) => {
@@ -85,7 +84,6 @@ describe("ECConnectionFactory - Audio inputs options", () => {
         mockClient,
         "!roomid:example.org",
         "m.call#ROOM",
-        MatrixRTCMode.Matrix_2_0,
         mockMediaDevices({}),
         new BehaviorSubject<ProcessorState>({
           supported: true,
@@ -131,7 +129,6 @@ describe("ECConnectionFactory - ControlledAudioDevice", () => {
         mockClient,
         "!roomid:example.org",
         "m.call#ROOM",
-        MatrixRTCMode.Matrix_2_0,
         mockMediaDevices({
           audioOutput: {
             available$: constant(new Map<never, never>()),
@@ -176,7 +173,6 @@ describe("ECConnectionFactory - Camera quality settings", () => {
       mockClient,
       "!roomid:example.org",
       "m.call#ROOM",
-      MatrixRTCMode.Matrix_2_0,
       mockMediaDevices({}),
       new BehaviorSubject<ProcessorState>({
         supported: true,
@@ -217,7 +213,6 @@ describe("ECConnectionFactory - Camera quality settings", () => {
       mockClient,
       "!roomid:example.org",
       "m.call#ROOM",
-      MatrixRTCMode.Matrix_2_0,
       mockMediaDevices({}),
       new BehaviorSubject<ProcessorState>({
         supported: true,
@@ -259,7 +254,6 @@ describe("ECConnectionFactory - Camera quality settings", () => {
       mockClient,
       "!roomid:example.org",
       "m.call#ROOM",
-      MatrixRTCMode.Matrix_2_0,
       mockMediaDevices({}),
       new BehaviorSubject<ProcessorState>({
         supported: true,
diff --git a/src/state/CallViewModel/remoteMembers/integration.test.ts b/src/state/CallViewModel/remoteMembers/integration.test.ts
index b610447d9..bf90e9eb4 100644
--- a/src/state/CallViewModel/remoteMembers/integration.test.ts
+++ b/src/state/CallViewModel/remoteMembers/integration.test.ts
@@ -38,7 +38,6 @@ import { createConnectionMap$ } from "./ConnectionMap.ts";
 import { membershipsAndTransports$ } from "../../SessionBehaviors.ts";
 import { localRtcMember, testJWTToken } from "../../../utils/test-fixtures.ts";
 import { deepCompare } from "matrix-js-sdk/lib/utils";
-import { MatrixRTCMode } from "../../../config/ConfigOptions.ts";
 
 // Test the integration of ConnectionMap and MatrixLivekitMembers
 
@@ -76,7 +75,6 @@ beforeEach(() => {
     mockClient,
     "!roomid:example.org",
     "m.call#ROOM",
-    MatrixRTCMode.Matrix_2_0,
     mockMediaDevices({}),
     new BehaviorSubject<ProcessorState>({
       supported: true,