I9502 cannot be powered on after upgrading 10

Samsung's official upgrade is buggy.

The mobile phone has a one-year free warranty, you can go to the after-sales service to see.

You can also use my bag, which should do the trick.

Need to do download mode:

In the power-off state, press and hold the volume down button + home button + power button at the same time, and then press the volume up according to the prompts to enter download mode.

This package can restore the official system of the Samsung i9502, which is the S4 Unicom version.

**I unzip your file out and open the odin file, 1In the power-off state, press and hold the volume down button + home + power button at the same time, and press the volume up button after the selection screen appears.

Enter Coal Digging Mode.

2Then connect the computer. Open the official flash file and swipe it, wait for a while, the phone starts to restart, sit back and wait for the reboot to boot.

Hello: You can do the following:

1. Remove the SIM card and SD card of the phone and turn it back on. See if it can turn on normally.

2. Press and hold the left function button of the phone and turn it on to see if the phone can enter safe mode. It is recommended that you back up your phone data and restore your phone to factory settings.

The above methods can not solve the problem to do infiltration, it is recommended that you bring your mobile phone, repair card and purchase invoice to Samsung mobile phone customer service to check the remaining test phone.

Hello: If you need to upgrade, please follow the steps below

1. Use Samsung KIES software to upgrade, please refer to the method provided on Samsung's official website for specific steps

The conditions required to use FOTA software to upgrade the lease level are: 1. Stable Wi-Fi or 3G network. 2. The power of the electric tank is more than 50%.

3. The available mobile phone memory is more than 1GB.

Hello: According to your description, there are many factors that affect the occurrence of smartphone malfunctions. A smartphone is like a small computer, such as third-party software conflicts, viruses, and excessive cache usage, which will cause the phenomenon of automatic restart.

It is recommended that you remove the external SD card and SIM card and test whether it still restarts.

If the problem persists through the above methods, it is recommended that you take your phone to the nearest Samsung service center for testing.

Hello and welcome to the Samsung Digital Services platform.

Samsung S4 Telecom Edition,You can brush the official firmware to recover,

Hello and welcome to the Samsung Digital Services platform.

After root, the kernel is destroyed, of course, you can't upgrade with OTA, you can see if you can upgrade with kies.

Based on your description, it is recommended that you try the following:

1.Charge with a cable charge for a while and try to turn it on, or replace a phone battery of the same model.

2.Take out the SIM card and SD card at the same time and try to power on again.

3.If the issue persists, it may also be related to third-party software that you have installed yourself**. When you see the "Samsung" logo icon when you reboot the device, press and hold the [Volume Down Button or -Menu Key] until the word "Safe Mode" appears in the lower left corner of the screen, and then let go, enter the settings and uninstall some self-** apps, then turn off the computer and try to restart it.

4.If you still can't turn on the computer after uninstalling the app, you can back up your data after entering the "safe mode" as described above.

Try changing the battery, maybe the battery is not charged.