https://code.tutsplus.com/tutorials/android-o-phone-number-verification-with-sms-token–cms-29141
origin - http://www.pipiscrew.com/2017/07/android-o-phone-number-verification-with-sms-tokens/ android-o-phone-number-verification-with-sms-tokens
https://code.tutsplus.com/tutorials/android-o-phone-number-verification-with-sms-token–cms-29141
origin - http://www.pipiscrew.com/2017/07/android-o-phone-number-verification-with-sms-tokens/ android-o-phone-number-verification-with-sms-tokens