Nubia Z7 often freezes after upgrading 4G Telecom 3 01?

hi！Hello, it is recommended to enter the REC to try the double clear operation, specific steps:

Shuangqing specific operation:

1. Press and hold the volume up button + power button in the shutdown state, release the power button after the phone vibrates and restarts, and keep pressing the volume button until it enters recovery mode;

2. Use the volume up and down keys to move the cursor, move the cursor to the wipe data factory reset line, and then press the power button to select it;

3. Use the up and down keys of the volume to move the cursor, move the cursor to the yes--delete all user data line, and press the power button to select;

4. At this time, the phone will perform a factory reset operation, and then the phone will return to the main menu;

5. Also use the up and down keys of the volume to move the cursor, move the cursor to the wipe cache partition row, and then press the power button to select;

6. Use the power button to select the reset system now, the phone will automatically restart, and the double clearing will be completed.

(3) Press the power button and the "volume up button" at the same time, and release the power button to enter recovery mode after powering on.

4) Select "Wipe Data Factory Reset" and then "Yes --Delete All User Data".

5) Go back to the main interface, select [Wipe Cache Partition] and then select [yes --Wipe Cache].

6) Go back to the main interface, select [Install Zip from SDCARD] and then [Choose Zip from SDCARD], then select the ROM package you put into the memory card

7) Select yes --Yes --Install.

8) Wait for the flashing to complete, then go back to the parent menu and select [Reboot System Now] - [No].

3.If it still can't solve your problem, please bring the relevant products to Nubia after-sales, Nubia after-sales provides the same warranty after-sales policy of root and flash. Let you experience third-party ROMs without worries while flashing your computer.

After-sales outlets:

Hello, the network type needs the built-in chip hardware support of the mobile phone, and it does not affect your use of the 4G network after you flash the system.

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Hi! Whether it supports 4G has nothing to do with the system, and whether the hardware of the mobile phone supports it, Xiaomi's official website.

Hello, after investigation, this mobile phone is a double four-G mobile phone, and its network standard does not support China Telecom's CDMA standard, so it is impossible to use a telecom mobile phone card.

Hello, Nubia Z5 series due to hardware reasons, only Z5S LTE supports 4G network and no other Z5 series. The currently launched Z7 series of Hand Xiang all support 4G networks.

The Nubiaz7 series does not support telecom 4G for the time being, and will be solved by software upgrade in the future.

The software upgrade will be Z7max and mini together, there is no difference as said downstairs.

Hello, Nubia Z7MAX is not supported for the time being, and it will be upgraded later through the version to support the signal frequency band supported by Telecom without Telecom 4G frequency band, and does not support Telecom 4G.

Customize the machine, if it is not supported, just buy a bare metal.

The system will be upgraded to support telecom 4G in the later stage

Is Nubia any good? What about the battery? Does it cost data?