Facetime and imessages not working through ur phone number

I’ld like to share my experience with this issue as the facetime and imsg was loading and not choosing my current number ( sim card )

this happens due to lack of authentication.

finally i recharged my SIM card with credit as

while you choose your number u must have enough credit ( or quota ) for authentication to happen as it sends SMS from the chosen number

have a nice day !