"""
According to the log, your phone is not registered on google servers. Please enforce a first time checkin by dialing ##CHECKIN## and check the logcat output.
"""
Ca correspond à composer:
"""
##2432546##
"""

et sinon, sans dialer, faire cette commande dans un shell en root via ADB:
"""

am broadcast -a android.provider.Telephony.SECRET_CODE -d android_secret_code://2432546

"""
via https://github.com/microg/android_packages_apps_GmsCore/issues/26