The old man can't answer the phone. Why?

If the phone can't answer the call, I suggest you:

1. Check whether the phone has enough balance.

2. Check whether the phone is in flight mode.

3. Check whether there is a new version of the system, and try to update the system after backing up the data.

4. Check whether the cell phone signal is stable. Please turn off the phone and restart it, and then search the network again.

5. Or try to replace another SIM card.

6. Check whether the call barring function is set: Phone-More-Settings-More Settings-call barring (you need to enter the password entered when setting the call barring) Note: The operation paths of different models of mobile phones may be slightly different.

7. If it is invalid, please back up the data in the machine (contacts, information, photos, etc.). ) and restore the machine to factory settings.

8, can be operated according to the following methods:

① We will restart the phone, press and hold the power button for a few seconds to restart. If there is no response, you need to plug and unplug the panel before turning it on.

② Check whether there is a signal display in the upper corner of the mobile phone. If there is no signal, or even the signal icon is not displayed, as shown in the figure below, try to plug and unplug the sim card again or replace the sim card. ?

③ Check whether the mobile phone is in flight mode or offline mode. In this mode, the network is disconnected, so naturally you can't make a phone call. This requires everyone to cancel this model. ?

In fact, if you are not in flight mode or offline mode, and you can still make a phone call a second ago. The possible reason is that running too many programs leads to a crash, so we empty the memory; Or a system problem. This can reset the phone or brush the machine.

9. If the problem still exists, the service center that bought the mobile phone will be tested by professional after-sales engineers. ?