Hi ​@Madster77, 

Thank you for reaching out.

We're sorry to hear that you're unable to make phone calls.

To help resolve the issue, please try the following troubleshooting steps:

• Restart your handset.
• Toggle Airplane Mode on for 60 seconds, then switch it off.
• Check that your SIM card is inserted correctly.
• Ensure your handset software is fully up to date.
• Confirm that Mobile Network services are enabled.
• Set the network mode to 4G/LTE Preferred:
  • Android: Settings > Connections > Mobile Networks > Network Mode > 4G/LTE Preferred
  • iPhone: Settings > Mobile Service > Mobile Data Options > Voice & Data > 4G or 5G Auto
• Manually reconnect to the network:
  • Settings > Mobile Networks > Network Operators
  • Turn off Automatic Selection
  • Select Three UK
  • Re-enable Automatic Selection
• Reset your network settings if the issue persists.

If the issue continues after completing the above steps, please contact our Live Chat Team or send us a direct message via our social media platforms so that we can investigate further.

Owethu