New SIM card in iPhone X not working. No service or data, only showing grey bars. Need help sorting it.

Forum|Forum|29 days ago
August 3, 2026
1 reply
9 views

New SIM card in iPhone X not working. No service or data, only showing grey bars. SIM is activated and works in a different phone, but not the iphone X. My old SIM card with O2 worked fine but I switched to ID.
When I put it in iPhone X, I have tried toggling Airplane mode on and off, resetting network settings in settings and restarting the phone but still no luck. Can anyone help me fix it please?

Gemma M

iD Mobile Employee

Hi @mbyiv1,

I'm really sorry to hear you're experiencing issues with your SIM card. Please try the steps below:

For iPhone:

Go to Settings
Tap Phone
Tap My Number
Delete the old number
Enter the new number
Tap Save

Then follow these steps to refresh iMessage:

Go to Settings
Tap Messages
Turn iMessage OFF
Go to Settings > General
Tap Reset
Choose Reset Network Settings
Once your iPhone restarts, go back to Settings
Tap Messages
Turn iMessage ON again

Your iPhone should now recognise the new SIM and verify your number. If this does not work, please get in touch with our customer service team via live chat to request a new SIM card.

Regards,

Gemma M

The iD Mobile Social Media Team

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