My provider is O2
ive done as youve asked and tried to send a text to a friend it has come up as ERROR and a red exclamation mark and gone to the draft box
Now you will need to make sure your Message Centre Number is XXXXX
The Message Centre Number needs to be +353868002000
If you have checked the Message Centre Number and are still having issues sending texts you should test your SIM card in another phone.
If you can send texts from another phone this means there is an issue with your own phone. You can send your phone for repair from any O2 Store.
If you can't send texts from another phone there is probably an issue with your SIM card. You can get your SIM replaced for free in any O2 Store.