What should I do if I change my phone card after the system upgrade?

IPhone card replacement is mainly caused by the following situations:

(1) system problem. If the system version is relatively low, it may be that some bugs in the old system have not been fixed or business functions have not been optimized, resulting in the phone being stuck when using applications such as APP. It is recommended to update to the latest ios system.

(2) Memory problems. If the memory is small, you need to occupy a lot of memory when running some large mobile games or apps. If there is not enough memory, it may get stuck. It is recommended to turn off the background application or use it according to the configuration of the mobile phone.

(3) Cache problem. Long-term use of mobile phones will generate a large number of application caches, such as WeChat, QQ and Weibo. It is recommended to clean or delete the app regularly and reinstall it.

(4) Setting the problem, you can enter the general, turn off some effect settings, or turn off some applications that come with the system, such as Siri service.

(5) If the card suddenly appears, it is recommended to restart the phone and try again. If the problem cannot be solved after restarting the phone, the factory settings can be restored (backup before operation is recommended). If you still can't reach the expected state of the mobile phone after the above troubleshooting, it is recommended to go to the after-sales outlets for testing or choose to buy other suitable iPhone phones according to your personal economic situation.