How to solve the problem of no service on Apple 4, why does the Apple 4 insert card show no service

The landlord, the Apple phone that I just bought back, I have to activate it with iTunes before I can use it. If you don't activate it, you won't be able to get a signal service. May I also ask the landlord, what version of the mobile phone did you buy?

Some phones have locks and need to be unlocked before they can be used. It's like if you buy a customized machine from Unicom, but you can't put a mobile number, even if you put a mobile number. However, it is true that there is no signal that cannot be used, and it is a reason.

For things like this, you have to unlock it before activating the phone.

iPhone4 Activation Tutorial.

3. After opening the iTunes Store, start to select the country, scroll down the page to the bottom, and select the small icon.

4. Then change the icon here, choose to register the US App Store, and introduce the tutorial of registering the US App Store, which has been introduced in detail before, and the registration process is relatively simple, and you can easily register abroad without a credit card. If you only want to register in China, it will be simpler and easier.

iPhone 4 New Phone Activation Tutorial:

1. Unlock begins, in the last registration process of iTunes, we have installed iTunes, and the next step is of course to press and hold the power button at the top of the fuselage, and then turn it on.

2. After about 20 seconds of waiting, the iPhone enters the lock interface, the unactivated iPhone 4 is still in English for the time being, the screen will prompt the user's phone is not inserted into the SIM card, and ask the user's iPhone to connect to the computer and open iTunes to activate it.

3. In the case of not unlocking, iPhone, like all mobile phones, can dial emergency **, and there are 5 language prompts on the dial pad, including Chinese Traditional.

4. Put in the SIM card that has just been cut.

5. After the iTunes software detects the iPhone with a SIM card, it will connect to the Internet for verification (Apple server), and then a carrier settings dialog box will pop up, here we must click "Update Settings", and after the update is successful.

6. The whole process takes dozens of seconds, and a prompt box will pop up on the screen after activation, "iPhone has been activated".

The above is the basic iPhone4 App Store registration and activation related tutorials, all of which are very simple, follow the step-by-step steps, and you can play the iPhone4 as you like after activation. However, for the time being, it is only available for the unlocked version of the iPhone 4.

iPhone4 sales are very large, so everyone naturally has a lot of problems, here is a summary of a few problems for you, are some Internet access, jailbreak problems, I hope to help you!

The U.S. version may be that you update something to lock the card lock.,Replace it with the system version of the card.,If you change the card of the national bank, try it.,Restore it after elimination.,See if it's a software problem.,Elimination method.。

How to solve the problem of no service on the iPhone.

The reasons for the lack of service and how to fix it are as follows:

1. If there is an error in the mobile phone system, it can be solved by turning off the mobile phone and restarting it.

2. If there is no service due to turning on the airplane mode, you can open the Apple phone settings, tap the airplane mode, and turn off this function.

3. The SIM card is not inserted well, pull out the SIM card and insert it again to see if it returns to normal, 4. The SIM card is damaged, resulting in this phenomenon.

5. If there is a problem with the network system of the Apple mobile phone, you can open the Apple settings to restore the network settings or restore the factory settings of the mobile phone.

6. If the arrears of the mobile phone are caused by the operator stopping the use, the arrears can be paid in time.

7. Mobile phone encounter.

Turn on airplane mode.

The reasons for no service and the solutions are as follows: 1. If there is an error in the mobile phone system, the former grinding reputation can be solved by turning off the mobile phone and restarting it. 2. If there is no service due to the airplane mode turned on, you can open the settings of the Apple phone, click the airplane mode, and turn off this function. Swim Rush.

What you can expect.

Whether the mobile phone card is in poor contact [Yes - change the card, no - continue below] Whether the surrounding signal is good or there is a signal shielding area (during school exams, military districts, etc.) [Yes - change places, no - continue below].

iOS version problem [Yes - flash upgrade downgrade, no - buy a new one

In general, it is a signal problem, so look at it in another place; Also, do you have a protective coat? The metal coat can affect the signal. Mine is, it has improved significantly after removing it.

Turn the airplane mode off and on again, and then wait a little longer and it should be fine, if you have a mobile card, then see if the network settings have turned on 3G, which will also lead to no service.

Dear, maybe there is no signal in your location, so it shows no service, which is normal. It may also be that your phone card is loose, such as trying to take the card off and put it back in, and then turn it back on

Can't find a signal, that's it.

You can turn on the airplane mode once and try it back, and it will reconnect to the service.

In this case, it may be that you have arrived in a sealed place, a place where there is no signal, for example, the elevator is too closed, and the mobile phone cannot receive the signal, and this will happen.

The answers upstairs are very j8, do you understand what the landlord is talking about? It's Apple 4 no service, his reason has nothing to do with the signal, you let him take it to the mobile company next to the transmitter is also no service, understand? Understand the title and then speak.,Landlord,I also have that problem with you.,It is recommended that you brush the machine on the computer yourself.,But this problem can't go away.,I still exist now.,I've said all the methods.,About what the signal is bad upstairs.,Mobile card or something.,It's all.,Lao Tzu has changed n sheets.,It's useless.。

It is recommended to go to the designated maintenance point to see, I plan to repair it, but now the frequency is less, or there is that problem.

1. The Apple 4 mobile phone shows no service, which proves that the mobile phone signal cannot be received, which may be because the surrounding signal is not good; Or it is caused by poor contact of the mobile phone card.

2. First of all, you can find a place with a good signal to test it and see if the mobile phone can display the signal normally.

3. If it is caused by poor contact of the mobile phone card, then it is necessary to reinsert the mobile phone card, and then it can basically be used normally.

4. The worst case is that the SIM card of the mobile phone card is broken, so you need to go directly to the business hall to reissue the ** card.

Dear,It's like this when you have a mobile phone.,The upper left corner.,There's no signal.。。。

Check to see if there is any airplane mode and Do Not Disturb mode.

It's not a problem with the signal.

Or generic - reset phone settings, restart iPhone

1. Turn on and off the flight mode.

When using the iPhone in daily life, there are occasional times when the mobile phone signal is poor, for example, in some cross-base station locations, the signal is often unstable. At this time, the user can try to turn on the airplane mode to try to restore the phone signal. Here's how:

The first step is to turn on airplane mode. Users can turn on airplane mode in the control center.

Step 2: Wait for about 5 seconds before turning off airplane mode.

In this way, it helps to solve the problem of bad signal, or no signal.

2. Manually select the operator.

Generally speaking, the iPhone will automatically connect to the corresponding network according to the user's mobile phone card. However, sometimes when the signal is not good, there will be a situation where the mobile phone network cannot be found, so you can try to manually select the network. Here's how:

In the first step, in the Settings app, tap to go to the "Carrier" option.

Step 2: On the carrier options page, turn off the "Automatic" function.

In the third step, the network operator will be displayed later, and the user only needs to select the corresponding carrier according to his mobile phone card. For example, China Mobile (Weibo) users can select "China Mobile".

3. Reset network settings.

After trying the above two methods and the phone signal is still poor, users can also try to reset the network settings function. Here's how:

In the first step, in the Settings app, on the "General" options page, click to enter the "Restore" option.

Step 2, On the "Restore" option page, click on "Reset Network Settings".

Users need to be reminded that resetting the network settings will clear the user's wifi password.

4. Flashing. If the iPhone signal problem fails to be solved after the above methods, there may be a system problem with the iPhone. At this time, you can try the method of flashing the system to restore the system. Here's how:

The first step is to connect your iPhone to your computer and run the iTunes software. On the iTunes page, click "Back Up Now" to make a full backup of your iPhone.

Step 2, then click on "Restore iPhone" while pressing shift, select the corresponding firmware to restore iPhone system.

If there is no service and no signal because the mobile phone signal is not good, it is recommended to check what causes it and then solve it according to the following methods:

1. Check whether the mobile phone card slot or SIM card is damaged: you can insert other mobile phone cards to try, and then put the SIM card of the mobile phone itself on other mobile phones to see if there is a signal, if the card slot is damaged, it is recommended to replace the card slot, if the SIM card is damaged, please go to the business hall to replace the SIM card.

2. There is no signal on the mobile phone caused by network delay: you can turn on the airplane mode of the mobile phone, turn it off after five seconds, or restart the mobile phone.

3. If the signal in the place is not good, the signal cannot be found, so you can search in another place.

Let's see if your phone has not been upgraded The system has not been upgraded, I have also encountered this problem, I am 4s, but because of the location problem, for example, the design of some viaducts will make the signal unable to transmit, just think that the underside of the X cross viaduct will have this situation! Don't press the home and lock button for 8 seconds This is equivalent to restarting the machine Just like restarting the computer Who knows that the computer restart must be consumed on the computer Although it is not big! You go somewhere else to see if it's like that, and if it's all there, and the system is up to date, then there's something wrong with the hardware, and you can go to the after-sales service to check it.

I'm the American version of Apple4,Often no signal (Wi-Fi has a signal to access the Internet),There is no new card,Every time you have to start anew,If your phone itself is fine,Try it in my order,It should be easy to use。

1. Eject the card. 2. Shut down. 3. Turn on the machine.

4. Push the card forward and press it. 5. There will be a paragraph of English press: Accept.

6. Dial 112 and hang up immediately. 7. In Settings: Turn on airplane mode.

8. Turn off the airplane mode after about 1 or 2 minutes. 9. At the bottom of the airplane mode, the operator will display: China Mobile.

10. Signal display...

Try to change the card, if it doesn't work, flash it again, and if it doesn't work, then you have to go to the test.

1. Signal or ** operator problems.

1. Sometimes when the signal is not good, such a problem will be encountered, and the call will fail and need to be redialed. This situation is generally caused by the current poor signal, and it is enough to dial again from another place.

2. Shut down. 1. If it is not a problem with the signal, you can try to turn off the computer first and then turn it on. You can do this by long-pressing the power button of your iPhone, and when the power off option appears, slide it to power off.

3. Insert the ** card.

1. If shutting down does not solve the problem, you can try it by reinserting the mobile phone card. You can use the needle or other similar object that comes with your iPhone to pick up the card.

2. Then there is a small hole on the right side of the iPhone that is specially used to take the card, and the ** card can be ejected with the card pickup needle. After taking it out, clean the **card, and then put it back in its original position, and finally try again to see if you can still dial**.

4. Reset network settings.

1. If you still can't solve the problem after trying the above methods, you can try to restore the network settings of your iPhone. In the settings list, please click the "General" column, 2. At the bottom of the general list, find the "Restore" column and click to enter.

3. Then click the "Reset Network Settings" option in the restore list, 4. Then click the "Reset Network Settings" button that pops up at the bottom to confirm the restoration. After waiting for the system to be restored, see if you can dial ** normally.

5. Hardware failure.

1. The above methods have been tried, and if it still doesn't work, you can also change a different ** card to try it. If you can replace the ** card, it means that it is a problem with the mobile phone card, and you can go to the local business office to replace the card.

2. If replacing the phone still can't solve the problem, it is likely that there is a problem with the hardware of the iPhone, and it is recommended to go to the local Apple authorized after-sales service for testing.