Is the Samsung A12 known for having issues with older SIM cards?

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SUMMARY

The Samsung A12 exhibits a specific issue where it loses SIM card connectivity when the battery level drops below 30-35%. Users report that the only solution is to fully recharge the device before it can regain functionality. This problem may be exacerbated by using an older SIM card, as one user noted their SIM was 7 years old compared to the A12's 1-year lifespan. Testing with a different SIM card is recommended to determine if the issue lies with the phone or the SIM itself.

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  • Understanding of smartphone battery management and performance.
  • Familiarity with SIM card functionality and compatibility.
  • Basic troubleshooting techniques for mobile devices.
  • Knowledge of Samsung A12 specifications and common issues.
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  • Investigate Samsung A12 battery management issues.
  • Research compatibility of older SIM cards with newer smartphones.
  • Learn about troubleshooting SIM card connectivity problems.
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This discussion is beneficial for Samsung A12 users experiencing connectivity issues, smartphone technicians diagnosing SIM-related problems, and anyone interested in mobile device troubleshooting techniques.

Delta2
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My smartphone seems to have a very weird problem, when ever the battery drops below 35%-30% it "loses" the sim card so I can't make or receive calls?
The fix is to first recharge it fully and then turn it off and switch it back on

It is a Samsung A12
Is this a known problem for A12s? Or perhaps it is a problem with sim card which I transfer from my old smartphone and the sim card is 7 years old (A12 is 1 year old).
 
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Have you tried just restarting the phone instead of charging it first?

When your calling is blocked, can you still send/receive texts, or does that not work too?
 
berkeman said:
Have you tried just restarting the phone instead of charging it first?
Yes it just doesn't work, I have to charge it first
berkeman said:
When your calling is blocked, can you still send/receive texts, or does that not work too?
Nope I can't.
 
Delta2 said:
Is this a known problem for A12s? Or perhaps it is a problem with sim card which I transfer from my old smartphone and the sim card is 7 years old (A12 is 1 year old).
You may do better on Samsung forums. It sounds like it could be the phone or the SIM.

One way to test is to insert a different SIM. Do you have a family member or friend who would let you try their SIM for 5 minutes?
 
anorlunda said:
You may do better on Samsung forums. It sounds like it could be the phone or the SIM.

One way to test is to insert a different SIM. Do you have a family member or friend who would let you try their SIM for 5 minutes?
Nope I don't have access to another SIM card.
 
Have you tried throwing it against a stone or marble wall and stomping on it with Tap Dance Shoes? This will do a factory reset keeping data intact. Samsung alternatives say you can also drop it from a building of at least 10 stories, and then you won't have to dance on it.

If it does not look like the example below, you did it wrong. You can thank me later.
 
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Samsung-Galaxy-A12-LCD-Display-Touch-Screen-Reparation-31082021-1-p.jpg
Samsung-Galaxy-A12-LCD-Display-Touch-Screen-Reparation-31082021-1-p.jpg
 

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