No sim card detected /loosing service every few mins.

[KylVie]

Hey, I just bough s25 ultra as well for my fiancée.

In just 2hours she started to have problems with sim card.

Phone keeps giving notification at the bottom that sim is not detected.

Then after 1-2 mins it will work again for few mins and again same issue.

Just to mention , she did not have any issues on her other phone with exactly same sim card.

And Yeah , we tried restarting, factory reset, checking if sim is clean and so on, settings also has been reseted.

I though for a sec it might be sim problem, but if is working in other phone but not in s25 ultra, then it can be software or hardware issue.

Seen people having same issues, Honestly I think we will just go for replacement, if same issue will happen, then I guess she will not have some great experience with her first Samsung phone

[arianwen27]

Take the sim out, make sure it's not dirty, make sure it's not come lose in the holder, put it back in and see if it's fine. Decent chance when you were pushing it in, it got slightly misaligned.

Trying not to assume a phone issue as that could get hard and expensive. Assuming the issue is cheap and easy at first seems like a good idea to me

[BandOfBrothers]

Try the sim card in the secondary slot @KylVie 

There is also a diagnostic tool found in your Samsung Members App. 

However if this issue remains then if your still within the cooling off period then have it swapped out. 

If i can be of any further help please don't hesitate to ask  😎 

[AndrewL]

@KylVie: To check if there is a potential issue with the SIM slot, please try inserting the SIM into the SIM2 slot to see if you notice an improvement. For guidance, please refer to page 16 of the user manual.

https://downloadcenter.samsung.com/content/UM/202501/20250124153524184/SM-S93X_UG_EU_15_Eng_Rev.1.0_...

[PaulC59]

I would try another sim card in the phone as they can be temperamental and you may need to order a new sim card. It may also help to blow out the sim slot to eliminate possibility of dust etc. As an alternative you could request an esim instead which are not susceptible to issues with sim chips

[davehorne]

In addition to all the suggestions, try your fiancé's SIM card in your phone. 

[KylVie]

Hey guys thanks for any suggestion.

It was actually a faulty sim reader.

In the replacement everything works perfect.

[AndrewL]

@KylVie: I'm sorry to hear that there was an issue with the SIM card reader, however I'm pleased to learn that you were able to resolve this via a replacement device. Thank you for keeping us updated on your progress. 

[davehorne]

Eventually physical SIM cards will just be a memory.  I switched to an eSIM as soon as I had the opportunity to do so.