What s wrong with the iPhone always showing no service

Apple has no signal or is searching in general, the problem is actually very simple, first look at the time and date of the mobile phone is correct, adjust the time and date, if there is still no signal, and then repeatedly switch on and off the flight mode 2 times, it can generally be solved.

If none of the above can be solved, then you have to consider whether there is a problem with the hardware of the phone.

The most problematic problem of Apple's mobile phone must be the three no faults (no signal, no wifi, no serial number) that occurs when the baseband is abnormal, some appear after falling, some appear after flashing, and of course there are three no faults in normal use, especially in the machine bought online, the three no faults appear more and more frequently. The second is that there are users who lock the machine and originally used the card, and the baseband is raised and the card cannot be unlocked again, in this case, it can only be unlocked by replacing the baseband of the mobile phone by changing the baseband or lowering the baseband. There are also many faults with no signal or poor signal.

I have repaired no less than 1,000 Apple mobile phones, in my actual maintenance of Apple mobile phone statistics, repair these three faults may account for more than 70%, I believe that anyone who has been in contact with the repair of Apple has a deep experience.

Mobile phone communication is to send and receive signals through the network base station, and then communicate with the called party, such as the mobile phone shows no service may be related to the following conditions:

1. The SIM card of the mobile phone is in poor contact with the shneme of the mobile phone card slot, resulting in the failure of the SIM card circuit and the inability of the mobile phone to communicate with the network base station.

2. The mobile phone is incompatible with the system due to the application software for installation, resulting in the system software closing the modem in the mobile phone signal processing circuit, at this time you can turn off the mobile phone and then restart, the modem in the mobile phone signal circuit will be restarted, and after the signal is normal, delete the suspicious mobile phone application software installed before the problem.

3. The SIM card of the mobile phone is not registered in the network, at this time, you can insert this SIM card into another mobile phone, if it also shows no service as the reason for the SIM card.

4. If the SIM card of the mobile phone is accidental, and there is no signal in the network signal coverage area, it fails to reconnect to search the network and merge the book, at this time, you can manually search for network registration under the menu of Settings - General - Network - Network Operator.

5. If the signal coverage of the mobile phone SIM card network operator is not available, you can change the location to an open area, and then check the mobile phone signal grid display, if the display is normal after changing the location, you can call the network operator service ** for feedback and complaints.

6. **The card has been used for too long, and with a valid certificate, you can go to the local business hall to reapply for a card.