Insert sim error happen if the phone is not acknowledging the existence of sim card inserted in the phone.
1. Check if the sim is properly inserted.
2. Turn off mobile phone
3. Remove battery
4. Remove memory card
5. Remove sim card
6. Check the copper pins of the sim if there are dirts stucked on it
7. Ure clean cloth to wipe sim gently
8. Wait for at least two minutes
9. Gently and properly insert the memory and sim card
10. Insert the battery
11. Turn on mobile phone
13. Check if you will still recieve insert sim error
14. If you still recieved the same error you need to call your service provider and check the status and availability of your sim card.
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