texting

[Charlotte6-8]

Sometimes I have sent a text to someone and they haven't received it, even when it has definitely gone from my phone.  The main problem is with a phone that is on EE network.

[jonsie]

See if this helps

Guide: Text Message Tips (not sent or received) 

If it's only one phoner having the problem ask them to check if they have accidently blocked you in the message settings