PhotonNetwork.ConnectToBestCloudServer("appVersion") not working on android but working in editor

When I am connecting Photon with ConnectUsingSettings in the code, it is working both in mobiles and android, but in my case User would be having the option to change the server if they can't find enough match in their server. So I am changing the server preference value with PhotonNetwork.OverrideBestCloudServer.

But even the simple PhotonNetwork.ConnectToBestCloudServer("1.0") is not working.