I am from Canada and visiting Bangkok for few months.

Is it a good idea to buy phone in Bangkok? I heard, it is cheaper here.

If yes, then where can I start. any reputed shop, or bargain shop

I am looking for GSM.

It is hard to say a place coz it is every where. If you stay in Bangkok, then goto MBK Shopping mall. Many shops to select. Very cheap.

If you stay in Bangkok, then goto MBK Shopping mall. Many shops to select. Very cheap.

They also have used mobiles, perfect condition and almost for free...

Seacon Square have a good selection including the latest Soney-Eric at Bt 28,000.It also includes a memory stick.

MBK PLAZA

There is lots of MALLS around BKK and they have one every were. The central group have a few the THE MALL have some other. They are big USA looking buldings with lots of shops inside. The best part is there is only THAI people inside 99 % and that means better price. Language can be a problem bring some one that speak thai can be a good advice.