Need a little help here please topic

i just got myself a One X, it isn't at&t or anything, there's no logo on it so i guess it's the international version?
i s-off'ed with htc dev and now it's s-off
the CID is 11111111
hBoot is 0.27.0000

i know the one x happens to have 4.2 with sense 5 but i checked ota it siad it's already updated while i'm on ICS, how can i upgrade to 4.2? i read the guides they're too confusing for me. I have successfully rooted with cwm installed, should i just download ARHD and install it or how should i go about upgrading it to 4.2?

please help me understand the firmware and software thingy too, i don't know what that is

Screen flickers (very little but noticable) topic

I've noticed that my screen flickers on AOSP roms such as Bliss POP and CM12. That is the reason why I am on stock rooted ZV6.
I am wondering why it flickers. When I say flicker, It doesn't flicker really bad as in a tv screen on a channel that doesn't work but flicker as in goes from low to high (just barely noticeable) and it is annoying and makes me worry about my phone.

Is my phone defective? Or is this a known issue on AOSP roms?

Little help pleasssse !!!!! topic

Hi guys as i know the lg optimus 2x has p990 in the model number and the T-mobile g2x has p999 in the model number ...the problem is that i have T-mobile written on the front of my phone but whene i checked setting===>about i found p990 in number model also i found lg p990 in the ticket under the battery !! Iwant to install a custum rom so which forum should i use this forum or the T-mobile forum ???

Sent from my LG-P990 using XDA Free mobile app