Need help : How to avoid account blocking : Exchanging mobile phones

Need help from dimers on how to avoid accounts getting blocked because of multiple logins from the same device.

Me and my brother want to exchange our phones but we fear our accounts in paytm , mobikwik , crownit , payzapp (just got to know they block too) etc maybe blocked as both devices will be detected for multiple account usage.
Help if there is any work around for this?