@simonb23
These are all the steps to try:
To fix an iPhone that can't send SMS messages, check your network connection, restart the device, and verify your phone number in settings. If these steps don't work, try disabling and re-enabling iMessage,
Basic checks:
- Restart your iPhone: A simple restart can fix temporary glitches.
- Check network connection: Make sure you have a cellular signal. You need mobile data or Wi-Fi Calling to send SMS messages.
- Toggle Airplane Mode: Turn Airplane Mode on, wait a few seconds, and then turn it off to force a new network connection.
- Update iOS: Go to Settings > General > Software Update and install any available updates.
Messages settings
- Verify your number: Go to Settings > Phone > My Number and ensure the number is correct. If not, update it.
- Disable and re-enable iMessage: Go to Settings > Messages > iMessage and turn it off. Restart your iPhone, then turn iMessage back on.
- Check "Start new conversations from": In Settings > Messages > Send & Receive, make sure your phone number is selected.
Advanced troubleshooting
- Check iMessage status: Visit the Apple System Status page to see if there are any known issues with iMessage or other related services.
- Reset network settings: Go to Settings > General > Transfer or Reset [Device] > Reset > Reset Network Settings. This will erase all current network settings, including Wi-Fi passwords.
- Contact o2.
- Check for blocked contacts: Ensure the number you are trying to message is not blocked in your contacts or by your carrier.
Also this guide here Guide: Text Message Tips (not sent or received)
O2 contact details : Guide: How to find help & contact O2
This is not customer services and we dont have access to your account
I do not work for o2 or any VMo2 /Telefonica/Liberty Global Company
