The Japanese version of Apple has five phone numbers in brackets, and texting is ok. IMessage has been displayed waiting for activation.

If your mobile phone is unlocked, you can try the following methods. If there is a locked version, don't try it easily: I don't know if I can escape from prison, as long as I can delete the following files.

Delete all files and folders under //var/root/Library/Lockdown with software such as funbox or ITOOLS (backup is recommended first), then click the flight mode in the settings, switch it once, and request to reactivate, reload the facetime ID password, and reload the imessage ID password.

After filling in the form, activate facetime imessage again for seconds. ...........

Pro-test is useful