but to install rainbow mod or any custom firmware...i need qualcomm bootloader...and after upgrading to 7.8 ...i again have nokia dload bootloader...the link you provided is for 7.5 as i already said...russian firmware has been used...i want for 7.8....
hmmmm. Whatever b.. Link i provide included the guide to downgrade to QC too...
Actually when i installed earlier 7.5 ( rainbowmod1.4) i didnt hard reset the phone just to see if it works without hardreset or not. It worked.. Means my bootloader didnt upgrade to DLOAD.. Actually i cudnt under why the need to upgrade to DLOAD.
Have u tried Nokia lumia downloader.. It works in windows no need to install linux (ubuntu)
I install wp7.8 ( rainbowmodv2.1) using nokia lumia downloader.