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Preferred SIM card not recognised for calls or messages

Sally251983
Level 1: Joiner
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I am experiencing problems with my phone recognising my SIM card.

Under settings>connections>SIM card manager, SIM 1 (i.e. the SIM card I use) is showing as 'unknown number' - I am not sure why, and under 'preferred SIM card', only 'Mobile Data' appears to be connected to SIM 1, the 'Calls' and 'Messages' options are faded out - I am not sure why...

 

Can anyone tell me how I can fix this? 

 

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MI5
Level 94: Supreme
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@Sally251983 

No number showing is not uncommon so shouldn't be an issue.

You need to check sim 2 options to see if that is somehow enabled for calls.

I have no affiliation whatsoever with O2 or any subsidiary companies. Comments posted are entirely of my own opinion. This is not Customer Service so we are unable to help with account specific issues.

Currently using:
Pixel 7a (O2 & Lyca), One Plus 6 (Sfr), iPhone 12 Pro Max (Vodafone)
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RafaC
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Hey @Sally251983 did you manage to sort this one out?

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Sally251983
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Thanks everyone - the problem was solved by doing a network settings re-set

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