Philips old man's mobile phone shows that sim card reading error.

1. Put a piece of paper on the back (not too thick, so that it can be put into the SIM card slot smoothly with the card. It's a little troublesome to put it up, try it patiently several times). 2. Stick some transparent glue on the back.

3. Replace it with a new and thicker card. I used an old SIM card in the M-Zone, which is relatively thin. This phenomenon often happens when I first use small 6. Later, I put a piece of paper on the back of the SIM card, and it never appeared again. A while ago, the paper on the back of the card was removed, and this phenomenon appeared again, and the frequency was very high. In desperation, the paper was put back. So far, it has been a week, and this phenomenon has not appeared.

Whether the SIM card is inserted correctly.

② Whether the SIM card is inserted incorrectly, such as the standard version inserted with the telecom SIM card, etc.

(3) Enter the hardware test to check whether the SIM card works normally (just enter * # * # 64663 # * * in the dialing interface). If the SIM card status is normal, go to step 5; If the status is unknown, go to step 4.

④ Try to replace a different SIM card. If the status is still unknown during hardware testing, it is recommended to go to the maintenance point for testing; If the detection status is normal, the operator is advised to replace a SIM card (SIM card may be aging).

⑤ Whether the network type is correct and whether the operator selection is automatic. (Unicom preferred 3G, mobile preferred 2G, and telecom preferred automatic)

⑥ If the network type of telecom mobile phone is CDMA automatic, the problem can be solved by changing the network type to "WCDMA priority" in the mobile phone information (* # * # 4636 # * *).

⑦ Whether there is no signal in this area. You need to check whether other mobile phones on the same network have a signal.

⑧ Back up the data, brush it to the latest system version and try again.