DESCRIPTION

1 - Root your phone

there are a lot of ways to root, but in my opinion it's better than the others
- Download KingRoot from here, or anywhere
- Install and connect to inernet ( in some cases you'll need a VPN )
- simply press " Try Root " and wait

2 - Install TWRP Custom Recovery

- First Download these files " TerMinal Emulator " – " BusyBox " – " TWRP for G3 Stylus "

Installing Busy Box

- Install the apk file and grant root

- after progress bar filled hit the install.

- Finished

Custom Recovery 

- Put Recovery.img and uboot.img to your internal storage 

- Open TerMinal and write these command ( available in txt file in the zip)

Like this:

su [all letters lowercase]

[grant the root]

dd if=/storage/sdcard0/uboot.img of=/dev/uboot count=1024
dd if=/storage/sdcard0/recovery.img of=/dev/recovery count=32768

[you must not make a mistake here, after sending commands you must see message just like the picture below, any mistakes at here can cause HARD BRICK, so be careful]
if your phone is not like this
1. check the command again
or 2. put the files (twrp zip) in the externad sd card and replace " sdcard0" with " external_SD' 

- if you see everything like the screenshot, you are finnished 
- Now type this in terMinal
su
reboot recovery
now your phone will reboot to recovery

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3 – Installing ROM 

- Boot TWRP Recovery and install the ZIP ROM

※Please make a backup of your device before installing or updating ROM