Ask the person you have been texting. Maybe their account has been blocked/suspended or their sim card has failed or the network has gone down. Do you have any more info that might help us guess?
I have no affiliation whatsoever with O2 or any subsidiary companies. Comments posted are entirely of my own opinion. This is not Customer Service so we are unable to help with account specific issues.
Please select the post that helped you best and mark as the solution. This helps other members in resolving their issues faster. Thank you.
