No signal after Apple 12 updated to 14 3? What to do

The solution is as follows:

1. Turn on airplane mode and turn it off.

Open [Settings] on your phone, then turn on the button to the right of the [Airplane mode] option, wait a few seconds and then turn it off.

2. Check whether the SIM card is damaged or replace the SIM card.

Remove the SIM card, check for damage or wear, or find another SIM card to insert into the iPhone 12 phone to try to fix it.

3. Update the iOS system of iPhone 6.

Update from your phone's [Settings] - General - Software Update, or connect your computer to iTunes.

Note: If the above methods can't be solved, it is likely to be a problem with the hardware of the mobile phone, and it is best to go to Apple after-sales service to request processing.

I know that some users have experienced an issue with "No Service" after upgrading iOS 13 or updating the system. When you see "No Service" or "Searching" on your iPhone, or you can't connect to cellular or cellular data, you can solve the problem as follows:

1.Restart your device: Try restarting your device before you can check it out.

2.Check the coverage area:

Make sure you're within the coverage area of your cellular network. Then, follow these steps:

Turn cellular data back on, go to Settings, then tap Cellular or Mobile Data.

If you're traveling abroad, make sure your device is set up for data roaming. Go to "Settings" - "Cellular" - "Cellular Data Options" - "Data Roaming".

3.Check for carrier settings updates:

Make sure your device is connected to a Wi-Fi or cellular network. Tap Settings - General - About This Mac. If an update is available, you'll see an option to update your carrier settings.

4.Reinstall the SIM card:

Remove the SIM card and put it back in. If you have other devices, you can test if the SIM card works. If your SIM card is damaged or won't fit in the SIM tray, ask your carrier for a new SIM card.

5.Try resetting your network settings:

Go to "Settings" - "General" - "Reset" - "Reset Network Settings". This also restores Wi-Fi network and password settings, cellular network settings, and VPN and APN settings that you previously used.

If you say "Cellular update failed," there was a problem updating the cellular communication feature on your iPhone or iPad. Your iPhone can't make or receive calls**, send or receive text messages, or access cellular data. After backing up all the data, send it to Apple after-sales for maintenance.

Restart,Restore network settings,Reinsert the card all try,Mobile 1 has no signal,Unicom comes and goes,Soon there will be no more,I saw someone post in the morning that the new system is easy to use,It's updated with a cheap hand.,Annoyed to death.。

Yours is Apple's official system has a problem, open mic in ten minutes to get a new version, you see if you can connect.

The reasons why Apple 14 has no signal include poor surrounding network, network setting problems, SIM card problems, system software problems, and mobile phone hardware problems.

1. The network around the disadvantage is poor.

The network of the surrounding environment is relatively poor, which will lead to the signal being in a state of no service, which will lead to no signal and no service on the Apple mobile phone, and changing a place with a good network can solve the problem.

2. Network setting problems.

After the iPhone has been used for a long time, the phone will suddenly have no signal and cannot connect to the network due to some reasons of the system itself, you can solve the problem of no service by restoring the network settings and restoring to the default factory settings, or by restarting the phone.

3. SIM card problem.

A problem with the SIM card of the mobile phone will also cause the mobile phone to be unable to connect to the network. You can take out the SIM card, check whether it is damaged or worn, or find another SIM card and insert it into the Apple mobile phone to try whether it is cleared to solve the problem, and if it still can't be solved, you can deny that it is the hidden cause of the SIM card.

4. System software problems.

Due to some vulnerabilities in the iOS system of Apple mobile phones, these vulnerabilities sometimes cause the mobile phone to be unable to search the network and display no service status, you can update your mobile phone's system to the latest version to solve this problem.

5. Mobile phone hardware problems.

If the above methods can't solve this problem, there is a high probability that there is a problem with the hardware of the mobile phone, and you need to go to Apple after-sales service to request processing. <>

The iPhone's overly compact internal design makes it impossible to leave enough space inside the iPhone for the signal antenna, resulting in a significant reduction in the efficiency and area of the antenna to receive signals.

In single-SIM mode, the signal quality of the iPhone 13 is at a moderate level, although it is not particularly strong. There is no pressure to play ** and surf the Internet, and there will be no failures.

But in dual SIM mode, one of the cards of the iPhone 13 will always drop the chain, and the signal of the other card may be full, but there is no guarantee that both cards will have high signal quality. As a simple example, if the mobile card and the Unicom card are plugged into the iphone13 at the same time, it is likely that the mobile card signal is full, and the Unicom card signal is very poor.

However, when the mobile card is unplugged, the signal of the Unicom card will return to the normal level, and the two cards cannot work at the same time. Perhaps this is the main reason why the iPhone 13 has a bad signal. Now there are more and more dual-SIM users, and Apple's handling of dual-SIM dual-standby is not rigorous, so users mistakenly think that the iPhone13 signal is too poor.

A poor cell phone signal can be due to the following reasons:

1.Having your phone in a dead zone can cause you to be "out of service", "temporarily unreachable", or dropped calls. This dead zone includes areas outside of network coverage.

2.The signal is not good due to interference.

3.Lost connection due to a failed switch.

4.Due to temporary network failures, or the network is unusually busy, the mobile phone signal will also be poor.

5.A SIM card using a 2G network can also cause a bad signal.

1. Get out of the blind spot of the signal: Sometimes the mobile phone signal is not good, you may be in the signal blind spot, such as in the elevator, basement or mountainous area, the mobile phone signal will be weak or unstable, at this time you can try to get out of the blind spot of these signals, go to some higher places or know that the place near the window to use your mobile phone, at this time to see if the mobile phone signal has improved.

2. Switch the operator of the mobile phone: Sometimes the signal of the network operator in the place where you may be located is not good, which will also lead to the instability of the letter bridge, which is where you can change the operator of the mobile phone from automatic to manual selection of the operator, and try to see if it has any effect.

3. Plug and unplug the SIM card of the mobile phone: When the signal is not good, there may be a problem with the SIM card of the mobile phone, you can try to take off the SIM card of the mobile phone, blow it and put it back again, and restart the mobile phone to see if the signal of the mobile phone has improved. Lift and eliminate.

4. Turn on and off the mobile phone airplane mode: When the mobile phone signal is not good, you can also try to turn on the phone's airplane mode, and then wait for more than ten seconds, and then turn off the phone's airplane mode.

5. Reset network settings: Click to enter the phone's [Settings] [Restore] [Reset Network Settings], so that you can reset the network and improve the signal strength.

If the phone does not read the card or has no signal, and the "Demodem Firmware" behind "About this machine" is blank, or an exclamation mark appears at the top right of the screen, it is basically a baseband problem.

This is a hardware problem, you can only disassemble the baseband, the baseband is on the motherboard, and the maintenance methods include resetting, flying wires, changing the baseband power supply, etc.

Different degrees of maintenance are different.

Generally, there is no need to replace the motherboard, only to repair.

The repair cost is much cheaper than replacing the motherboard.

I've been working in the Apple Factory store, so I know a lot about these.

Here is the repair process.

Apple 12 has no signal, it may be that the signal is poor in the location you were in, there is no signal in the mountains, tunnels, elevators, or it may be that the signal module is broken, and Apple will repair it free of charge after the warranty period.

Summary. Dear, I'm glad to answer for you. [Bixin] [Bixin].

The reason why there is no signal after the Apple phone is upgraded is that the signal system has not adapted to the Apple upgrade. [Bixin] [Bixin].

Tips to boost your iPhone's signal:

1. Turn on and off the airplane mode.

2. Reset network settings.

If the phone signal is full, but the network speed is still very slow, you can reset the network settings to improve the signal problem.

How to operate: Settings General Reset network settings So that the network will be restored to the state of the new machine But the wifi password needs to be re-entered.

Why is there no signal after the Apple 13 upgrade.

Dear, I'm glad to answer for you. The reason why there is no signal after the Apple mobile phone is upgraded is that the signal system has not been adapted to the upshift after the Apple upgrade. [Bixin] [Bixin] Tips for enhancing the signal of Apple mobile phones:

1. Switch on and off the airplane mode Sometimes the signal is not good because there is a problem with the signal reception of the mobile phone, as long as the airplane mode is switched on, let the phone search for the signal again to recover. 2. Reset the network settingsIf the mobile phone signal is obviously full, but the network speed is still very slow, you can restore the network settings to improve the signal problem. How it works:

Settings General Reset network settings so that the network will be restored to the state of the new machine, but the wifi password needs to be re-entered.

I hope I can help you

Do you have any other questions? [Bixin] [Bixin].

Compare the heart] [compare the heart] [compare the heart].

Summary. The reason why there is no signal after the Apple mobile phone upgrade is that the signal system has not adapted to the Apple upgrade is caused by 1, sometimes the signal is not good because of the problem with the signal reception of the mobile phone, as long as the flight mode is switched on, let the mobile phone search for the signal again to recover. 2. Reset network settingsIf the mobile phone signal is obviously full, but the network speed is still very slow, you can restore the network settings to improve the signal problem.

How to operate: Settings General Reset network settings So that the network will be restored to the state of the new machine But the wifi password needs to be re-entered.

Can you tell us more about that?

The reason why there is no signal after the upgrade of the Apple mobile phone is that the signal system has not adapted to the 1,Switch the flying touch pie filial piety mode Sometimes the signal is not good because there is a problem with the signal reception of the mobile phone,As long as you switch off the laughing draft airplane mode,Let the phone search for the signal again can be restored。 2. Reset network settingsIf the mobile phone signal is obviously full, but the network speed is still very slow, you can restore the network settings to improve the signal problem. How it works:

Settings General Reset network settings So that the network will be restored to the state of the new machine, but the wifi password needs to be re-entered.

The mobile phone suddenly has no signal is generally because of where we are, the first position, it may be that the mobile phone signal is relatively not good, or we are in the process of using it, the mobile phone may have some systemic failures, at this time it is best to restart the device to try.

1. If the iPhone12 mobile phone signal is not good, then you can try to upgrade the system to the latest version, and the new system will generally be more friendly to new models like iPhone12.

2. How to upgrade the iPhone system: Open [Settings] - [General] - [Software Update], as long as there is a new version, it will prompt.

3. In addition, it is recommended to reinsert the SIM card and update the operator settings, which may also reset the mobile phone signal.

4. iPhone12 mobile phone uses Qualcomm X55 baseband, this baseband in addition to iPhone12 in use, many domestic mobile phone manufacturers are also using this model of baseband.

Apple 12 suddenly no signal, you can restart the phone, reinstall the phone card, try it, it should be fine!

Question cards. I have tried all the factory and network settings. Now the network is 1xLandline. Can't access the internet to play on mobile phones.

1.It may be a problem with the base band, which is a hardware failure, and you can go to the manufacturer for free to replace it.

3.If you have just plugged and unplugged your SIM card, you may also encounter this problem, it may be that the SIM card is not in good contact, after turning off the mobile phone, it should be okay to reinsert the SIM card. 4.

If you have just upgraded the iOS system, turn the airplane mode on and off. Repeat the operation several times and you're good to go.

I feel like you're most likely in the first case.

Let's take it to an Apple phone repair shop for testing.