SIM card not recognized by mobile phone? Why cannot I identify the SIM card on the mobile phone?

Step 1:

1. First shut down the mobile phone, and then as shown in the figure below, we will deduct the rear cover of the mobile phone, and re-insert the SIM card for multiple times.

 
Step 2:

2. If we are sure that SIM card insertion is OK, we still cannot identify the boot of our mobile phone, in the mobile phone "settings-SIM card management, whether to enable sim1 or sim2", as shown in the following figure.

 
Step 3:

3. if you still cannot identify the SIM card correctly, it may be because of a problem in the mobile phone system. You can reset your phone or remind you to back up your personal data, such as the address book, text message, and photo. The resetting method is as follows: go to system settings-backup and reset, as shown in the figure below:

 
Step 4:

If you still cannot solve the problem after you restore the factory settings, it may be that the hardware of the mobile phone is faulty. Let's look at the following method:

1. Check whether the SIM card is broken. You can put the SIM card on another manual and try it out.

2. Verify the SIM card slot of the mobile phone. You can't check if someone else's SIM card is on our mobile phone. This is estimated to be a problem with our mobile phone.

3. The SIM card slot on the mobile phone is bad. In this case, we have to perform after-sales service to make changes.

4. The card is not cut well. This can be tested in the form of replacement card.