Ive been flying around this region for a while now, and lately 132.8 has been having prob's with loads of background noise. It became so irritating that i told the controller off to get him to do something bout it. As for the other freq's, they have been ok.
132.6 experiences congestion during certain times of the day, its mainly due to the short area of control that they have between 14000ft and PK.
Over east malaysia the coverage is preety good.
At one time pilots used to sit down and talk to atc quite a bit, but i think it should be started again. If ure from Atc, why dont u get in touch with MAPA and maybe they could work out a dialogue. At the same time get jump seat travel to singapore and honkong to see how the guys do it there. Atc kul could learn alot from them.
Im sure your president Encik Remli could get in touch with them.
ciao.