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The Samsung Galaxy A31 is a mid-range Android device released by Samsung in April 2020. Identifiable by model numbers SM-A315(F, F/DS, G/DS, and G/DSL).

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Sim card is not detectable?

Okay So, I got upset and threw my phone through the ground it broke my touch screen and charging slot I fixed them after I repaired them and changed the flat cabel at the repair store I factory reset my phone sim card is not regonized I put my sim card on another it worked so what is the problem here ?

Update (10/12/2022)

What is broken in my a31 device that is not detecting my simd card although sim card is perfect and working perfectly on other mobiles ???

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@Lebgamer Ps4 Throwing your phone in anger can cause many things to be break at once. I am curious as to why you are treating this as unusual or surprising.

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Throwing the phone on the ground certainly didn't do it any good. It appears as though there is more damage than what you saw and fixed.

Doing board level fault finding you'll need the schematics for the phone.

Here's an image of the SIM troubleshooting flowchart from the manual, that may help as a starting point.

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Lebgamer Ps4 estará eternamente agradecido.
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