This App Help to verify Email and mobile number authontication
#step 1 download and Unzip file then import in your Android Studio
#step 3 Syn Project if it's need download lib, or you can change it as your existent lib(Optional)
#step 4 Connect to your Firebase Project if it you allready created in firebase delete google-services.json file and add your own google-services.json()
#step 5 Done