By flashing roms, you automatically void your device warranty!
First of all you should have these minimum requirements...
1) You should have an android phone..(my process will only support android devices)
2) Your device should have at least 30% of battery.
3) You should have a data cable.
4) You should have a ROM supported for your phone..
5) You should have a TWRP or CWM recovery for your phone.
6) and a PC.
Steps to install marshmallow rom ..
1) Download the supported ROM for your phone from here by searching
your device name.
2) Download the Gapps from here for android marshmallow.
3) Now copy both these files into your SD card.
4) Now shut down your phone and press power and volume up botton to
go to recovery mode.
5) Wipe cache and dalvik cache.
6) Now install the ROM ".zip" file donloaded.
7) After installation of ROM flash Gapps ".zip" file.
8) Now simply click reboot button.
your device name.
2) Download the Gapps from here for android marshmallow.
3) Now copy both these files into your SD card.
4) Now shut down your phone and press power and volume up botton to
go to recovery mode.
5) Wipe cache and dalvik cache.
6) Now install the ROM ".zip" file donloaded.
7) After installation of ROM flash Gapps ".zip" file.
8) Now simply click reboot button.
All done , Have fun.... with marshmallow features.. :-)
Please comment if having any problem..or want to know about your device..
If your phone breaks, blows up or runs away from you, do not cry to me.. :-)
