Hi there
I’m sorry to hear your text messages have been delayed or not received at all! That’s certainly not good! Is this happening with all contacts, or just certain numbers? I’d recommend sending a text to 151 containing the word TEST. If messaging is functioning correctly, you should receive a reply. If you still are unable to receive a reply, I’d recommend performing a factory reset after first backing up any important information.
Once you have restored your information after the reset, try the 151 test once more and your texting should now be functioning as intended!
I hope this helps!
Charise