sony xperia c

upgrade xperia c to lolipop 

first have to root Download this

install it click root after download flashfy 

install it download recovery here and flash it from flashfy install zip from sd card 

after that rom  file xperia c 1, xperia c 2, put sd root folder flash 1 and then 2, from recovery menu you can access recovery by vol down and power or from flashfy reboot recovery after installation wipe factory reset and wipe cache reboot phone its done if u done proper procedure nothing will brick if you make your own procedure surly gonna break be careful good luck tested on my own phone
if system ui crash flash this, or bug fix flash this flash in recovery mood
GOOD LUCK