How to flash Custom Rom

Now comes the fun part: flashing your ROM. First, obviously, you need to find the ROM you want. You can find almost every custom rom made for Gionee M3 on this blog.

When you've found a ROM you want to try, download it and save it to your phone. It should come in the form of a fairly large ZIP file, so you'll probably want to be on Wi-Fi to download it. You can either download it directly from your phone, or download it on your computer and transfer it over via USB.

Before flashing custom rom make sure you are on the same kernel as used by custom rom (Mostly its KitKat Linux 3.4.x), you can check this by going into Settings> About Device (it's under “Kernel version”).

To flash your ROM:

1. Reboot your phone into Recovery mode, just like we did back when we made our Nandroid backup.
2. Head to the "Install" or "Install ZIP from SD Card" section of your recovery.
3. Navigate to the ZIP file you downloaded earlier, and select it from the list to flash it.
4. Wait for the process to complete; it may take a few minutes.
5. Depending on your situation (see below), you may also need to wipe your data and/or cache. In TWRP, you'll find this under the "Wipe" section, and in ClockworkMod, you'll need to either choose the "Wipe Data/Factory Reset" option or the "Wipe Cache Partition" option. When you're done, you're free to reboot into your new ROM.

So, when should you wipe your data and cache? Here are a few general guidelines:

• If you're flashing a ROM different than the one you're currently running, you should wipe data and cache. Essentially, this performs a factory reset on your phone, and you will lose all your data.
• If you're flashing a new version of a ROM you're already running, we recommend wiping your data and cache—but you should be able to get away with just wiping the cache, meaning you get to keep all your apps and settings.

Remember, if you backed everything up with Titanium, then doing a factory reset isn't all that bad, since you can just restore most of it. Keep in mind that even if you're just upgrading your existing ROM, factory resets can be helpful. If you only wipe your cache, note that a few apps may run into issues, but reinstalling them or wiping that app's data usually fixes the problem.

When you reboot, you should be in your shiny new ROM, ready to play!