Why am I unable to text certain people after updating the iOS version on my iPhone?

[iMore Question]

I downloaded ios8 on my Iphone 5 Now I cannot text certain people.

 

[anon(5140585)]

Re: ios8 trouble

Give it a hard reset a few times and post results.

 

[Haseeb Rehman]

If nothing works, restore your iPhone and set it up as a new device.