diff --git a/lib/shared/device-list-utils.js b/lib/shared/device-list-utils.js
--- a/lib/shared/device-list-utils.js
+++ b/lib/shared/device-list-utils.js
@@ -218,11 +218,41 @@
   await updateDeviceList(signedDeviceList);
 }
 
+async function replaceDeviceInDeviceList(
+  identityClient: IdentityServiceClient,
+  userID: string,
+  deviceIDToRemove: string,
+  newDeviceID: string,
+): Promise<void> {
+  const { updateDeviceList } = identityClient;
+  invariant(
+    updateDeviceList,
+    'updateDeviceList() should be defined on native. ' +
+      'Are you calling it on a non-primary device?',
+  );
+
+  const { devices } = await fetchLatestDeviceList(identityClient, userID);
+
+  // If the device to remove is not on the list and the new device is already on
+  // the list, return
+  if (!devices.includes(deviceIDToRemove) && devices.includes(newDeviceID)) {
+    return;
+  }
+
+  const newDevices = devices.filter(it => it !== deviceIDToRemove);
+  newDevices.push(newDeviceID);
+
+  const newDeviceList = composeRawDeviceList(newDevices);
+  const signedDeviceList = await signDeviceListUpdate(newDeviceList);
+  await updateDeviceList(signedDeviceList);
+}
+
 export {
   verifyAndGetDeviceList,
   createAndSignSingletonDeviceList,
   fetchLatestDeviceList,
   addDeviceToDeviceList,
   removeDeviceFromDeviceList,
+  replaceDeviceInDeviceList,
   signDeviceListUpdate,
 };