I ported my phone today and its been an absolute nightmare.  First of all I noticed that imessage was not activating (I had 10.99 credit on my account).  I then notice that my relatives in the UK could not send sms's to me either.

So 

I have credit on my account

I have reset network settings

I have contacted support (they gave me APN settings etc) 

I have now completely reset my iphone

None of the above work, imessage still wont activate and I still can't recieve sms text from the UK althought they can recieve them

Having gone through this process with 2 iphone in my family I thought this would be simple but it causing me real issues as I can't authenicate certain apps either for two fator 

Is there any fix other than to port back vodafone