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If your phone gives you the sim card error, it means either the sim is not properly inserted, or the phone cannot read the sim card. Remove the sim and reinsert it back in the phone to see if it will work.
Try to use the sim in another phone, if it works, then it means your phone has been restricted to some certain sim cards and if it does not work on another phone, then it means the sim card is bad and the solution is for you to get a sim swap.
If the sim works on another phone, then you have to flash the phone with the appropriate software and cable in order for it to be able to work with any sim card.
Hi,when a phone keeps saying insert Sim card, is either the Sim card has problem or the Sim tray of the phone is bad and will need tobe replaced.
To confirm, Take the Sim card and insert it into another phone, If it still says insert Sim, that means the Sim card is bad, But if the Sim card works with another phone, That means the Sim tray of the phone is damaged.
Sim tray is located on the phone where you insert your Sim card in on the phone to make sure the Sim works with the phone.
There are two things causing this problem,either your phone is not registered to the Sim card's network or your Sim card is corrupt
To find out where the problem has come from,you should try another Sim with your phone, if the Sim does not work then the phone is registered to a particular network and no other Sim card will work on it.
If you try another Sim card and it works then your Sim card is corrupt and you should replace it.but to be double sure,test the Sim card on another phone to see if it works,if it does then your phone is not compatible with the Sim card's network but if it does not work then your Sim has to be changed
Try to get an eraser and erase the sim contacts on the phone and the copper part of the sim itself. If this does not work, try inserting another simcard to your phone.
it depends on the kind of sim card you a re inserting, First, the sim card may be damaged, or probably the sim port on the phone may be damaged or bad. Then secondly, not all sim work with all phones, like the CDMA sim only work with cdma phone and it won't work on any other phone except cdma phones and normal mobile sim will not work on a cdma phones as well. verify all this to know where the problem comes from...if probably you try another sim on the and it works, it means that the sim card is the problem but if it doesn't work then the problem is directly from the phone, i.e. the sim port on the phone, you can then take your phone to an engineer for repair or the customer service center for repair. Thanks
Here is two possibility either you used sim in wrong slot like you have nano sim and you used into micro sim slot or other different slot. or your mobile is sim locked and that is why it not accepting at&t sim. here is how to unlock at&t simcard.
As your att sim working fine with blackberry so sim is fine no issue with sim card. on which mobile you have tried this sim as you have not mentioned your other mobile it is same as blackberry or apple or samsung mobile.
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