Failed to register phone your number. Please check your network connection and try again.

[Sharmer]

Got stuck in a loop trying to connect my phone contacts. Got my phone number wrong and the captcha checks also. Probably attempted too many times. Now when I try and get an SMS sent to me to register my phone. I get the following message and can go no further. 

"Failed to register phone your number. Please check your network connection and try again."

Tried rebooting etc etc. No joy. Any help appreciated...