'SIM Card Invalid' After Update on Galaxy S20

[CrazyGitar]

My wife's phone no longer recognises its SIM card, or any other. Her SIM card, however, does work in my phone (Galaxy S8).

Her phone is from the US and is currently used in the UK. She was with Sprint, but her phone was unlocked and now she has a Lebara SIM card that has been working for over a year now.

I believe the update is the cause of the problem as this happened immediately after the update, and we've gone through all of the usual fixes (reseating the SIM card, restarting the phone, clearing SIM card cache, wiping the cache partition, etc.)

Can someone please advise how to fix this as my wife's phone is currently unusable.

[TessM]

Hi @Members_0EMur8E ,

happy to help. As you have tested this with other SIMs, and the same thing happens, I would suggest having this looked at by one of our engineers as this may be down to an issue with the SIM card tray or the reader failing. 

Please do keep in mind that repairs to non UK/EU phones may take a bit longer than the expected due to the parts needed and will be chargeable. You can arrange this from here: Book Your Repair with an Authorised Service Centre | Samsung UK

[CrazyGitar]

Hi @TessM, thanks for replying. Do you think it could be the reader or the card tray failing when it happened exactly when an update occurred?

My wife was on a phone call (so everything working perfectly), and then immediately after it updated it stopped recognising the SIM.

I really feel like this is a software issue rather than a hardware one.

[Robot-]

There thing is you have no warranty in the UK for a US phone regardless of what happened. Also being an s8 warranty would have expired by now anyway

[CrazyGitar]

I get that about warranty, but if Samsung put out an update that broke it surely there's some way to fix it? Also, my phone is an S8 (working fine) but it's an S20 that's at fault, although that is similarly going to be out of warranty.

[TessM]

Hi @CrazyGitar ,

I would be unable to confirm without having a closer look at the phone, which is why I would recommend having this looked at by one of our specialist so they can determine what happened and if this has been caused by the upgrade or any other thing. 

[BaronDigo]

Have you tried?
1. Ressetting the *network settings*?
2.This one is rare but check if your IMEI is still valid by simply connecting to a wifi. If you can connect to a wifi, then good.
Lastly,factory reset, being fully aware that you will lose important data.