The iPhone X does not read the card for repair

The iPhone X does not read the card for repair

iPhone X does not read the card, the card holder has no fault, still can not read the signal, check the card slot, found that the SIM card seat shrapnel contact is not good, lower the shrapnel again, the fault is repaired.

[Machine model] iPhone X

[Fault Symptom] The mobile phone does not read the SIM card, and after inserting the SIM card, the mobile phone still displays no SIM card. The fault of the mobile phone without SIM card is usually caused by the abnormal working conditions of the SIM card and the line, or the base band line of the mobile phone, resulting in the failure to read the carrier signal inside the SIM card.

[Maintenance process]

After disconnecting the machine, connect to the power supply, first measure whether there is a fault in the SIM card seat, boot measurement SIM card seat found that the voltage is normal, and there is no obvious damage. The signal of the SIM card was continued to be detected, and it was found that the signal could not be read even if there was no fault in the SIM card. Therefore, it was found that the shrapnel contact of the SIM card seat was poor after checking the card slot.

[Maintenance result]

After the shrapnel is lowered again, the phone card can be identified by turning on the machine and inserting the phone card. The network is normal, the data service is started normally, and the fault is repaired.