How to find ARM processor version on android device?

Execute the following command:

adb shell getprop ro.product.cpu.abi

Try

adb shell cat /proc/cpuinfo

There is also:

adb shell getprop ro.product.cpu.abilist

Try,

adb shell getprop | grep ro.product.cpu.abi

It would give you the abi type based on which you can find which arch the device belongs to.

Reference : https://developer.android.com/ndk/guides/abis

Eg;

x86         - 32 bit x86 architecture
x86_64      - 64 bit x86 architecture
armeabi-v7a - 32 bit arm architecture
arm64-v8a   - 64 bit arm architecuture