[Q] Data problem with my Note

Hi everyone, am new here, i decided to register on XDA after scrounging and searching of solution to my problem. All of my finds were disappointing and vague. So i finally joined up after going thru an intimidating XDA signup vid (one of the reasons i didnt wanna join in the first place). So here's the prob..

My N7000 (international) is bad at picking up signal, which forces the phone to go for Edge instead of H/H+/3g. I live in a country where 3g is supported. I could connect to 3g as well as having better connections (using the same simcard, as well same location) with my friends S3 and Ace 2 but not my Note :( So i figured maybe that theres probably something wrong with its hardware (?)

One other thing, if i set my network mode to WCDMA, the phone will have NO signal AT ALL. With GSM only, theres weak/moderate signal, same goes to (Auto Mode), which am guessing it'll only choose GSM.

My phone is running Philz Kernel. BurtRom JB XXLSZ. And ive also tried XXLSO (problem still exist)

Should i try flashing AOSP roms..maybe, flashing diffrent radios help? :/ mehh..i really dont know anymore..

Sorry, if my question seems long. And i genuinely believe that i needed to post a new thread to get a solution from the pros! thnx in advance..