Information about the china lollipop rom topic

hi guys,
so i did the mistake and i flashed the china lollipop rom. i was pretty desperate and i thougt that i'm stock with it forever.
but, i figured it out and decided to share my experience and maybe save you time (and probably a heart attack :p).
let's begin!
first of all, with this #%#^# rom flashed, tou CANNOT downgrade back to kitkat. i'm no expert, but i did a big research and found nothing. if you do find anything, please share with us :)

secondly, if I tryed and flash above any other rom, the call sound was bad. wich lead us to the next problem - you cannot flash a modem (trust me, i tryed ALOT) without loosing your baseband, IMEI and signal - in other words, you lost the all idea of a cell phone! great..
for those of you who lost the baseband and IMEI, the only solution that i found was to re-flash all of the chinees rom files.

so, what do you do if you want to change the rom, but like me you get bad call quality?
here's what i did-
thank goodnes, AL-IRAQI uploaded the russian version of lollipop, wich you can find here.
now for all of those who wonders, don't worry, you will not lose IMEI and baseband.
after i flashed the russian version, i flashed the PRISM BARBONE rom (again- AL-IRAQI:angel:) and the call quality is perfect! so i get to live happily ever after :)

there is however one last thing that i don't know (because i didn't try) - are we able to flash a modem now that we are based on the russian loillipop? if any of you have information about that, please be kind and share it with the rest of us.

hopefully you find this usefull :)