The TelMe app will not function if the allow mock locations setting is enabled on your device.
If you see the Android Error Message: "This function is not supported when mock locations are turned on. Please go to your devices settings and turn them off to continue."
Follow these steps:
Tap the menu button, then Settings.
From the 'Settings' screen, go to 'Applications' by tapping on 'Applications'.
From the 'Application settings' screen, go to 'Development' by tapping on 'Development'.
On the 'Development' screen tap the check box next to 'Allow mock locations' and make sure it is UNCHECKED or set it to "No mock location app set in Android 6.0 and above.
Mock location call rejection
Android Mock Location Settings