[Q] Before flashing a 5.1 rom over a stock 5.0.2 rooted do i need a cm12.1 nightly ?

[galaxys3lover]

I was on CM12 stock 5.0.2 (version 12.0-YNG1TAS2I3) and i wanted to root my phone , so I unlocked bootloader and rooted the phone but now I want to flash a new Rom but I ve read in a couple of rom threads that we have to flash another 5.1nightly before flashing a ROM and I am not sure I understand this part.

I would be grateful if someone could help me with the process of flashing a 5.1 rom and gaaps for the first time on a freshly rooted phone
P.S : ( I also want to use calaukin's gaaps modified by mohit (http://forum.xda-developers.com/oneplus-one/themes-apps/gapps-modified-slim-gapps-calkulin-t3082242).

 

[Heisenberg]

Flashing the CM12.1 nightly first ensures that your firmware is up to date. The process goes like this:

1. Download the latest CM12.1 nightly and install it with your custom recovery (no need to flash gapps, but make sure you perform a full wipe (system, data, cache, dalvik cache) first).
2. Boot the phone up once.
3. Boot back into your custom recovery and perform a full wipe.
4. Install your chosen ROM + gapps.
5. Boot phone.
6. Enjoy.

 

[galaxys3lover]

Flashing the CM12.1 nightly first ensures that your firmware is up to date. The process goes like this:

1. Download the latest CM12.1 nightly and install it with your custom recovery (no need to flash gapps, but make sure you perform a full wipe (system, data, cache, dalvik cache) first).
2. Boot the phone up once.
3. Boot back into your custom recovery and perform a full wipe.
4. Install your chosen ROM + gapps.
5. Boot phone.
6. Enjoy.

Thank you so much . I followed your guide too so thank you for the support .

 

[davebugyi]

It is not necessary to flash nightly first, most ROM threads provide a separate firmware flashable .zip (just make sure it is flashed correctly, cause people reported issues with newer TWRP than 2.8.6.0)

 

[Heisenberg]

It is not necessary to flash nightly first, most ROM threads provide a separate firmware flashable .zip (just make sure it is flashed correctly, cause people reported issues with newer TWRP than 2.8.6.0)

I used to share your opinion. But, while a lot of ROM threads do provide a firmware zip, they aren't maintained, it's usually uploaded and forgotten about. Flashing the nightly ensures that you're on the very latest firmware available.