From STOCK to CUSTOM rom

[czarek2371]

Hi, I would like to install custom rom for my friend. He has Samsung Galaxy S 4 Mini GT I 9195 LTE version. From what I've read, I should flash custom recovery by Odin from here: https://forum.xda-developers.com/showthread.php?t=2678420 , than install custom rom for example: https://forum.xda-developers.com/ga.../rom-cyanogenmod-14-0-s4-mini-3g-lte-t3471761 (it's LineageOS 14.1). Before installing custom rom i would like to full wipe(everything possible in twrp wipe section) . Here's my question: Do I need to flash stock firmware(from sammobile 900 MB it's huge) before flashing custom rom or LineageOS has built-in firmware and it's not necessary? Ideally, if you would write me at points what should i do from the beginning. Regards

 

[noppy22]

Hi, I would like to install custom rom for my friend. He has Samsung Galaxy S 4 Mini GT I 9195 LTE version. From what I've read, I should flash custom recovery by Odin from here: https://forum.xda-developers.com/showthread.php?t=2678420 , than install custom rom for example: https://forum.xda-developers.com/ga.../rom-cyanogenmod-14-0-s4-mini-3g-lte-t3471761 (it's LineageOS 14.1). Before installing custom rom i would like to full wipe(everything possible in twrp wipe section) . Here's my question: Do I need to flash stock firmware(from sammobile 900 MB it's huge) before flashing custom rom or LineageOS has built-in firmware and it's not necessary? Ideally, if you would write me at points what should i do from the beginning. Regards

No you don't need the stock rom unless you want to go back to stock later.

1. Flash the latest TWRP with odin. (Untick reboot option, and pull the battery when you complete the flash, then put battery back in)
2. Reboot to recovery. Wipe system, data, internal sd card0, cache, dalvik/art cache
3. Install the custom rom(& gapps if you want them) as per instructions on the first post of the rom thread and reboot