I have been using gpay since last 4 years and never did I face such issue that I'm facing now. I removed my old sim for some minutes to see if another (new) sim is working fine. Then I placed the older sim back in the same slot (the one connected with my bank) and BAM!!!! My accounts got disconnected and as I try to set them up all over again, the sms verification failed. It happened multiple times. I don't know how to fix this. Guess Paytm/ phonepay are my last resorts. This is terrible!