[ZTE Grand X V970] bgcngm:
Frequently asked questions (FAQ)

Question: I can't install your custom ROMs. Why? What am I doing wrong?

Answer: First of all you have to flash a custom recovery into your phone and then you are able to install my custom ROMs. Read the tutorials on post #2 to know the procedures.​

Question: I wanted to try one of your custom ROMs. Will I loose all my data after installing it?

Answer: Yes, you will loose all your data... unless you create a backup to restore after installing the ROM. There are two recommended ways to create backups of your userdata:

Doing the backup under custom recovery mode: navigate to backup and restore menu.

Using Titanium Backup to create a backup of your favourite applications.

Question: Can I fully revert to factory settings?

Answer: Sure, just download the full stock ROM and use SP Flash Tool to reflash the whole NAND.

Warning: the files are for V970, so if you are flashing a V970M make sure that you deselect preloader or else you'll get a brick.​

Question: In phone specifications it's stated that it has 4 GB of eMMC, but only approximately 500 MB are available for internal storage... Can you explain me the reason for that?

Answer: The phone has indeed 4 GB of eMMC. Part of it is used by system and cache partitions, while the rest of the size is divided into internal storage (approximately 500 MB) and an internal sdcard partition (approximately 2 GB). If you find that an internal sdcard partition is useless (and have a big external sdcard), you can extend userdata partition (internal sdcard partition completely disabled). Jump into post #4 to learn how to apply that mod.​

Question: Somehow I have got invalid IMEI numbers. How do I restore my phone's IMEI numbers?

Answer: Read this tutorial. Don't forget to say thanks to its author.​

Question: Does my phone really have two IMEI numbers?

Answer: Every dual SIM smartphone based on MT65xx SoC has two IMEI numbers. Some just don't display both numbers on dialler when you type code *#06#, but if you go into Settings / About phone / Status / IMEI information you'll see the IMEI set for both slots.​

Question: How can I access hidden MediaTek engineering mode?

Answer: From phone's dialler type code *#*#3646633#*#*.​

Question: Are your custom ROMs patched to fix Android's master key (bugs 8219321 and 9695860) vulnerabilities?

Answer: No, but the solution to that is pretty simple:

Install Xposed framework (instructions on the support thread)

Install Master key dual fix module (instructions available also on it's support thread)

To check if system is vulnerable you can use one of the following apps:

SRT AppScanner

Bluebox Security Scanner

All credits to rovo89 for the amazing Xposed framework and also to Tungstwenty for the Master key universal fix.​

Question: I don't have this phone, but mine is also based on the same MT6577 SoC. Can I still flash your recovery and install your custom ROMs?

Answer: Even though your phone is based on the same SoC, there may be differences in other hardware components. It is not likely that recovery and ROMs will work on your phone so you may risk to brick it.​

Question: After installing Android 4.1 based ROMs, I'm not able to access sdcard anymore, even though it is accessible via CWM recovery.

Answer: Due to hardware differences between models, the included kernel is not compatible. The alternative is to flash the latest V970 kernel compiled by [MENTION=5238428]superdragonpt[/MENTION], which can be found here.​