iPhone 12 has no network signal

The first step is to enter [**].

The second step is to enter *3001* on the dialpad, and then press the [Call] button, the iOS built-in app Field Test will be launched, and the exact value of the signal strength will also appear in the upper left corner.

Step 3, Press and hold your iPhone's On/Off key (i.e., the top power key) until the "Slide to Power Off" slider appears.

Step 4: Finally, press and hold the home button until the power off slider disappears, and the phone will return to the home screen interface.

Step 5: This signal strength value will always be displayed in the upper left corner of the iPhone screen, and you can also tap on it to switch between the number and the signal bar.

There is actually a hidden app in the iPhone usage tips, which can be used to detect the iPhone signal, the iPhone cellular network value, and it can accurately display the strength of the mobile phone signal with numbers. And it allows you to switch between the grid and the value by doing the following: the lower the number, the worse the signal.

In general, between -40 and -50 is near the base station;

The signal between 50 and 60 is very good;

The signal between 60 and 70 is considered good;

Between 70 and 80, the signal is slightly weaker;

Between 80 and 90 is a weak signal;

Below 90 is the basic communication state.

100, it is recommended to sleep at night or turn on the airplane mode, otherwise it will consume power and radiate a lot!

Manually select the carrier.

Your iPhone will automatically connect to the appropriate network based on your card. However, the iPhone sometimes has convulsions, if you have a poor signal, you can manually select the network to try. Go to [Settings] - [Carrier] - [Turn off auto] and so on, search out the network, and then select the corresponding carrier according to your card.

For example, mine is a mobile card and chooses China Mobile.

Toggle airplane mode on and off.

Sometimes we are in a cross-base station position, and the signal diving is unstable. You can try toggling the airplane mode, first turn on the airplane mode for 5 seconds and then turn it off, and then see if your signal is full of health.

Reset the network. If you try the above two methods, the signal is still very poor, it may be a problem with your network settings, you can try to reset the network to see if the signal improves! Method:

Go to [Settings] - [General] - [Restore] - [Reset Network Settings]. Reminder: Restoring the network will not erase any data of the phone, but the wifi password recorded by the phone will be erased.

Flash the recovery system.

If none of the above methods can solve the signal problem, it may be a system or hardware problem. You can try to make a full backup of your phone with iTunes first, and then restore it. If it still doesn't work, you can only go to the after-sales inspection to replace the machine.

If Apple 12 shows that there is no network, check the cause and solve it in the following ways: It may be that your location signal is not good, so you can't display the network, you can change to a place with a better signal to view; It is also possible that there is a system problem, and restarting your phone below should be able to solve it (I have encountered such a situation before); Of course, there is also the possibility of hardware damage, which can be detected in the App Store**App Leleda.

If the hardware is damaged, you can only go to the repair shop for repairs.

The operator announced that the iPhone 12 signal difference has nothing to do with the network, and there is only one way to solve it.

Cause: Caused by a problem with the mobile phone network.

1. Enter your iPhone home screen and tap Settings, as shown in the figure below.

2. First of all, put the flight mode.

The switch turns on and off twice, as shown in the figure below.

3. Then click General in the settings, as shown in the figure below.

4. Click Restore on the general interface, as shown in the figure below.

5. Click Reset Network Settings on the Restore interface.

This is shown in the figure below.

6. Enter your phone lock screen password to verify your identity, as shown in the figure below.

7. A second confirmation prompt appears, click to restore the network settings, as shown in the figure below.

8. Check the network signal, the service has been restored. This is shown in the figure below.

Solution 1: Reset the network settings.

Many times, when the iPhone can't connect to the cellular network or wifi, we only need to reset the network settings of the phone, and then reconnect it.

Here's how to set it up:

Step 1: On the desktop of your iPhone, find the Settings icon of your phone and tap to open it.

Step 2: After entering the settings interface of your phone, find the [General] option in the interface and click to enter.

Step 3: After entering the general interface of the phone, find the [Restore] option in the interface and click to open.

Step 4: After entering the reset settings interface of your phone, find the [Reset Network Settings] option in the interface and click it.

Step 5, Finally, in the prompt interface that pops up on your phone, continue to click the [Reset Network Settings] button.

Solution 2: Restart your phone or turn on airplane mode again.

The cellular data network signal of the iPhone mobile phone is provided by the base station, so sometimes the signal of the mobile phone is not good or there is no signal suddenly, but it is not necessarily a problem with the mobile phone, it is likely that we are at the edge of the signal coverage of the base station, which causes the phenomenon that the iPhone suddenly has no signal, at this time we only need to restart the airplane mode of the mobile phone, or restart the mobile phone is also OK. Here's how to set it up:

The first step is to find the [Settings] icon on the desktop of your iPhone, and tap to enter.

Step 2: After entering the phone's settings interface, find the [Airplane Mode] function in the interface, and slide the switch on the right side of this function to open, and the switch turns green to mean that the function is successfully turned on.

Step 3: After a while, we can turn off the [Airplane Mode] function.

There is also an easier way, that is, click on the small white dot on the iPhone, then find the [Control Center] option, and click, and then find the icon of the aircraft in the control center interface, click on, wait for the aircraft icon to turn orange for a while, we can click on this icon to turn it off.

Solution 3: Manually select the carrier.

iPhone in the default state,It automatically selects the corresponding operator network,But occasionally the phone will have no service or bad signal,At this time, we can manually select the operator。

Here's how to set it up:

Step 1: On the screen of your iPhone, find the Settings icon of your phone and tap to open it.

Step 2: After entering the settings interface of your phone, find the [Carrier] option in the interface and click to enter.

Step 3: After entering the network selection interface of the mobile phone, find the [Auto] option in the interface, and slide the function switch on the right side of this function to turn off, and the switch turns gray to mean that the function is successfully closed.

There are several possible reasons why your phone suddenly has no signal:

First: the signal is relatively weak, resulting in no signal, change to a place with a better signal Second: accidentally set to airplane mode, you need to be able to open the control center, first turn on the airplane mode, and then turn off the airplane mode, so that the mobile phone can search for the mobile network signal again.

Third: It may be that the SIM card slot is damaged, and you need to replace the SIM card slot, try Fourth: Hardware problems, you need to send it for repair.

Fifth: You can go to the location on the map for consultation and maintenance.

This Apple 11 sent by the fan,It's an assembly machine.,No signal.,I've asked several masters to help him repair it.,None of them were repaired.,In the end, I got it!

The accessory blocks the signal of the iPhone, try it in another place, or go fix it.

Apple12What's going on with the phone without a signal, hello,1、The surrounding network is poorThe surrounding environment network is relatively poor,It will lead to the signal in a state of no service,At this time, it will lead to no signal and no service on the Apple phone,Replace a place with a good network to solve the problem。 2. Network setting problemAfter the iPhone phone is used for a long time, due to some reasons of the system itself, the mobile phone suddenly has no signal and cannot connect to the network, 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: If there is a problem with the SIM card of the mobile phone, it 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 to insert into the Apple mobile phone to try to solve the problem, but if it still can't be solved, you can deny the reason for the SIM card. 4. System software problemsDue to some vulnerabilities in the iOS system of Apple mobile phones, these vulnerabilities sometimes lead to the mobile phone can not 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. If the above methods can't solve this problem, there is a high probability that there is a problem with the hardware of the hand-dismantled machine, and you need to go to Apple to ask for after-sales service.

There are several reasons why the iPhone 11 mobile phone has no signal: 1. The user's current location is relatively closed, such as a sealed room, basement, etc.; 2. If the mobile phone card is in a shutdown state, the mobile phone will naturally have no signal; 3. Another reason is that the user is located in a remote area or rural area, the signal tower coverage is low, and the signal is very weak. Users can check the signal problem by themselves according to the above situation.

Apple's iphone12 mobile phone is Apple's first mobile phone that supports 5G network, officially for this reason, many people have bought iphone12, but a small number of users have reported that iphone12 occasionally has no signal, so how to solve it, let's take a look at the solution to iphone12 mobile phone no signal.

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.

The general reasons for the sudden lack of signal on the Apple 12 are as follows:

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.

2.Turn your phone off and restart it. Here's how:

First quickly press Volume Plus and then let go, quickly press Volume Down and then let go, and finally long press the Side button until the iPhone turns back on and the Apple logo appears.

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.

1. Check the coverage area and turn the cellular network back onMake sure you are within the coverage area of the cellular network, and then try the following:1Go to iPhone Settings - Cellular and try turning the option back on.

2.You can turn Airplane Mode on and off in iPhone settings or Control Center to let your device find the signal and network again. 3.

Try restarting your device. As you go through each of these steps, check that the cellular network is working properly after the operation. 2. Check Carrier Settings UpdateYou can connect your device to the Wi-Fi network, manually check if there is a carrier settings update and install the corresponding update:

Tap Settings - General - About This Mac. If an update is available, you'll see an option to update your carrier settings. To see the version of the carrier settings on your device, tap Settings - General - About This Mac, then look next to Carrier.

If you insert a new SIM card into your iPhone or iPad, you'll need carrier settings for your new carrier. 3. Reinstall the SIM card After removing the SIM card, then put it back on. If the SIM card is damaged, or you can't insert the SIM tray, ask your carrier for a new SIM card.

If your SIM card was transferred from another device, ask your carrier if the SIM card works with your iPhone. If it's convenient, you can also try installing a different SIM card to see if it's working to rule out the problem. 4. Try to reset the network settingsGo to "Settings" - "General" - "Restore" - "Reset Network Settings".

This action won't erase data from your iPhone, but it will reset your Wi-Fi network and password settings, cellular network settings, and the VPN and APN settings you used earlier. 5. Update your deviceYou can try to upgrade your iPhone system to the latest version to see if the problem is solved. Please make sure to back up important data before upgrading your system.

If none of the above solves the problem, try contacting your carrier to make sure your phone number is working and that there are no service interruptions in your area, that your device isn't blocked from receiving cellular service, and that the correct data is set up**. It's important to note that if you see "Cellular Update Failed" after an iOS update or restart, the iOS diagnostics have detected a problem with your device that needs to be repaired. You need to bring the device to Apple's official after-sales service for maintenance.

You check your cell phone device.

Troubleshoot the problem.