Apple dual card dual standby cannot receive the secondary number information.

1, brand model: iPhone 12 System: iOS 1 1 Apple Dual Card Another card can't receive SMS, which may be caused by the phone not enabling this number.

2. If some verification codes or short messages are not received, other ordinary short messages can be received normally. It may be that some interception services are blocked by security software, so just cancel the interception. If you don't receive all the text messages, your mobile phone may be full. Clean up the storage.

3. If the above steps are still not improved, it is recommended that you back up the important data in your phone, and then restore your iPhone through iTunes. Take Apple xr as an example. The system version is iOS 1 1. The reason why the iphone secondary card can't receive SMS and the solution are as follows: There is something wrong with the phone, try to restart the phone.

4. Try to restart Apple 12 mobile phone. Try to restore Apple 12 phone settings, and go to phone settings-General-Restore-Restore all settings.

There may be the following two reasons: Apple's dual-on dual-standby mobile phone has not been very stable since the previous generation, and the signal quality is very unstable after installing dual cards. Especially when mobile phones pass through tunnels, underground garages, elevators, etc. There seems to be a signal. In fact, it is necessary to reset the phone to flight mode and turn it back.

6. This problem may be caused by your phone settings or card slot problems. Here are some possible solutions: check card slot: Make sure that both your cards are inserted into the card slot correctly and the card slot is not damaged. Change card slots: Try to change the slots of two cards to see if there is any improvement.