Many problems after firmware upgrade

hi guys

my w550i had wsod a few weeks ago and i gave it a service centre to flash it, they flashed new R4CA004 software in it but after the update new problems arose, they are

1. numerical keypad lights are dead
2. cant record calls
3. phone restarts itself when using walkman an pressing More
4. when i start phone without sim it doesnt shut down and restarts itself so i have to take out the battery to shut it down
5. memory status in phone shows 10MB more free memory than original whereas when connected to computer shows correct info.
6. i cant answer and end calls using the portable handsfree button, and the mic volume is too low when using handsfree

plz help me shud i flash the phone to latest R4CB020 firmware, if so can any one give me a tutorial on how to flash w550i cid49 brown phone ( i have donwloaded the firmware from downloads section)

thanks

Easiest way is going back to SC or try SEUS.

Yep, if phone after service centre is working as you described it means that guys at SC screwed something up. So it's up to them, to repair your phone for free.
And it looks their flashed with incompatible firmware, such bugs happen if you flash with a different phone's firmware and you have luck to get phone starting ;-)

hey i dint give it to sony ericsson service center but gave it to a local guy
coz my warranty period was over

and abt firmware i have R4CA004, this is the software for w550

now i have R4CB020 downloaded from topsony with phonexc v6, phone xs , xs++, which software shud i use to flash the phone to latest firmware

and my phone is cid49 brown one

plz help detailed instructions

your phone is brown which means it is not retail version of the phone but a test/demo/pre-release.
i don't know how they missed that in the service centre unless you took it to shop other than sony ericsson authorized one, in which case they flashed RED firmware into BROWN phone.

my bad, i didnot read ur last post.

well that "local guy" fu****d up your phone, so now you have to fix what he damaged.
there are tutorials here about converting your brown version of the phone into red version, please read them.
after conversion you have to flash your phone again, but with RED version firmware.

so u mean i cant even flash brown firmware with phone xc

i dont have any other cable other than dcu-60 to convert back to red

There is no way to change the color with DCU-60, for that you need a service cable.
But you should go back to the "local guy" and let him change your phone color, because he did the mistake!

Finding brown firmware seems to be impossible...