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Question

SIM switch issue

  • January 24, 2026
  • 1 reply
  • 13 views

Switched from O2 but can only use the phone on WiFi as idmobile connection is not working . Shows my old number that I’ve taken over as O2 and the idmobile temporary number that does not work. Any ideas ??

1 reply

Gemma M
iD Mobile Employee
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  • iD Mobile Employee
  • January 25, 2026

Hi ​@Andypenny 

 

I'm really sorry to hear you're experiencing issues with your service. Please try the steps below, depending on the type of phone you have:

 

For Android:

  • Open Settings
  • Tap General Management
  • Tap Reset
  • Select Reset network settings

 

For iPhone:

  • Go to Settings
  • Tap Phone
  • Tap My Number
  • Delete the old number
  • Enter the new/transferred/current number
  • Tap Save

Then follow these steps to refresh iMessage:

  1. Go to Settings
  2. Tap Messages
  3. Turn iMessage OFF
  4. Go to Settings > General
  5. Tap Reset
  6. Choose Reset Network Settings
  7. Once your iPhone restarts, go back to Settings
  8. Tap Messages
  9. Turn iMessage ON again

Your iPhone should now recognise the new SIM and verify your number.

 

Regards,

 

Gemma M

The iD Mobile Social Media Team