What to do if there is no signal after Samsung phone is rooted

2.If it is a dual-SIM phone, please check whether the SIM card is activated: Settings - SIM Manager - SIM1 SIM2 - Click the SIM card icon - slide to turn on (the operation mode may be slightly different for different models of mobile phones).

3.If there is still no signal, it is recommended to turn off the SIM card and remove it, wipe the SIM card chip with an eraser, and then reinstall it. 4.

If it doesn't work, try to change to another location to rule out whether it is caused by poor signal coverage in your location. 5.Try to change the network mode to 3G or 2G (do not select the auto-connect mode).

Note: Some machines do not support changing the network mode. 6.

Try to change another SIM card. 7.Update the system version of your phone:

Settings - About Phone (About Device) - Manual Update Automatic Update (Software Update System Update - Update). Note: Please back up the data (contacts, messages, **, etc.) in your device before upgrading.

If there is still no signal or emergency call is displayed after the above operations, please bring the purchase receipt, warranty card and device to the Samsung service center for inspection.

Sorry, we can't provide relevant root operations, because you can get root access through third-party software, you can access and modify almost all files in the mobile phone operating system, but this operation may affect the stability of the phone, and there will be human failures such as crashes and restarts.

In addition, after obtaining permissions, it usually causes problems to major components of the motherboard, such as memory and CPU. Root is a modification of the operating system software, and according to the regulations, it does not belong to the scope of the warranty. In order to improve customer satisfaction, we provide free firmware upgrade service for root customers, and if the root has affected the hardware of the mobile phone and needs to replace the motherboard, the motherboard fee will be charged.

Supplement: If your machine has been rooted, you need to restore the machine to the original system version after rooting, please send the machine to the service center for after-sales engineers to help check and process. It is not possible to unroot the device by resetting the device to factory settings by yourself.

Rooted mobile phone is prone to problems, there are a few friends around me who have not deleted things after rooting, and there will be a crash or sudden pop-up phenomenon, it is recommended not to root. And I also asked Samsung's maintenance staff.,People clearly told me that there is no way to root.,The landlord is dead.。。

1. For security reasons, the official restricted access to the authority and failed.

Second, there is a certain risk if the root is successful

1. After the phone is rooted, you can modify or delete all files including the system, and it is easy to change or delete the system files by mistake without a certain professional foundation, 2. Wrong operation will cause the instability of the mobile phone system, the machine cannot be turned on, and some functions cannot be used, etc., 3. And the root may cause hardware damage, and the after-sales service will not be warranted, so it is recommended not to root.

3. If the use of the mobile phone is affected by system failure, it is recommended to go to the after-sales service or professional repair shop to solve the problem.

After flashing, if the phone has no signal, you just need to reinstall the kernel tool and restore EFS.

Here's how:

2. Open the software and select Backup EFS

3. Restore EFS.

Reason: This is caused by the loss of EFS information, it is recommended to back up the EFS information of the mobile phone when flashing. EFS file is used to access the mobile phone IMEI serial number, wireless network card MAC address and network settings of important information components, at present, it is found that upgrading the ROM of unknown baseband and frequent flashing or wrong double clearing method will lead to EFS information loss, IMEI serial number is cleared or zeroed, baseband is unknown, unable to use mobile network and other failures.

The analysis of the original sound method is as follows:

If the SIM card is no longer recognized, there is a problem with the SIM card, and there may be oxidation and aging, so it is recommended to replace the SIM card with a new one.

The second possibility is the problem with the phone itself, and I didn't notice it when I flashed it, but there was a problem with the card slot, and it was recommended to repair it at what time.

It can also be repaired by a mobile phone signal booster, and a device called a mobile phone signal amplifier that is currently popular on the Internet is popular with users in remote villages, basements, and homes or communities with poor mobile phone signal. A cell phone signal amplifier can amplify the cell phone signal around us, which can improve the quality of the network. It is very practical for users in some of the lower residential areas, basements.

Dear Samsung users: There is a problem with the Samsung mobile phone flashing into the mobile phone system: 1. In order to understand and solve the abnormal problems that occur after the mobile phone is flashed, it is recommended to send the mobile phone to the nearest Samsung service center for testing, and the service center will determine the specific problems of the mobile phone according to the test results and further deal with them.

2. Due to the risk of flashing, Samsung's official website does not provide flashing software, and it is recommended not to flash the machine by yourself. If there is a problem after flashing, do not operate it by yourself to avoid the problem from expanding.

Hello: Through your description, in this case, in order to understand and solve the problems of your mobile phone more specifically, it is recommended that you send your mobile phone to the nearest Samsung service center for testing, and the service center will determine the specific problem of the mobile phone according to the test results and further treatment. It is not recommended that you do it yourself to avoid an irreparable situation.

Please brush back to the official and then swipe the third party.