Firebase phone authentication not working after .apk released in play store even after I have updated sha1 in firebase console after that I have generated google-services.json again and updated json file in android studio project.
There was many other sha1 was also present in firebase console project setting should I delete them before generating new google-services.json
When you upload an apk to the play store then play store creates a new certificates called "App signing certificate". This will contain the SHA1 certificate that you require. It can be found at:
Released Management->App Sigining on your play console. Copy it and paste it in your firebase app -> project settings -> add sha1 fingerprint.
Although, it's been 15 days but I hope it still helps.
来源：https://stackoverflow.com/questions/46772115/firebase-phone-authentication-not-working-after-apk-released-in-play-store-even