Automatic SMS Verification without SMS permission

This can be achieved by SMS Retriever API. With the SMS Retriever API, you can perform SMS-based user verification in your Android app automatically, without requiring the user to manually type verification codes, and without requiring any extra app permissions. When you implement automatic SMS verification in your app, the verification flow looks like this:

Ensure that your app supports 64-bit devices

Starting August 1, 2019, your apps published on Google Play will need to support 64-bit architectures. 64-bit CPUs deliver faster, richer experiences for your users. Adding a 64-bit version of your app provides performance improvements, makes way for future innovation, and sets you up for devices with 64-bit-only hardware.

If your app uses only code written in the Java programming language or Kotlin, including any libraries or SDKs, your app is already ready for 64-bit devices. If your app uses any native code, or you are unsure if it does, you will need to assess your app and take action.

The first thing to do is check to see if your app uses any native code. Your app makes use of native code if it:

• Uses any C/C++ (native) code in your app.
• Links with any third party native libraries.
• Is built by a third-party app builder that uses native libraries.