Hi ​@zta35, 

Thank you for reaching out.

We're sorry to hear that you're unable to make calls or use your mobile data after making your payment.

Please try the following troubleshooting steps:

• Restart your handset.
• Turn Airplane Mode on for around 60 seconds, then switch it back off.
• Ensure your SIM card is inserted correctly. If possible, remove it, check for any damage or dirt, and reinsert it.
• Check that Mobile Data is enabled in your handset settings.
• Ensure Data Roaming is enabled if you're still outside the UK.
• Manually select a network:
  • Go to your handset's Network Operators settings.
  • Turn Automatic Network Selection off.
  • Wait for the available networks to load.
  • Select a compatible network manually, then switch Automatic Selection back on if required.
• Set your handset to 4G/LTE to see if this provides a more stable connection.
• Ensure your handset software is fully up to date.

If possible, we'd also recommend testing your SIM card in another compatible handset. This will help determine whether the issue is related to the SIM card or the handset itself.

If you've completed the above steps and the service still isn't working, please contact us via Live Chat or send us a direct message through one of our social media platforms, and we'll be happy to investigate this further.

Owethu