I've just port from Maxis to Celcom 4 days ago. While the reception is ok, the data connection is a super big letdown for me.

I work in KLCC area and stay in Kota Kemuning area, both which I have very unstable data connection. Like previous forumer said, when its on 4G, it's only 2/3 bar. 3G will get 4-max. But even with full bar, simple page like Google also can't load. Complained a couple of times and waiting for their tech people to call back (which I doubt will ever happen)

I took up the plan after my colleagues said its good, but now it seems like maxis does provide a better connection, but at a much higher price.

Going to try Celcom till end of the month. It's a very good deal if their service is at least 50/60% as what is advertised. I'll definitely port out if it's still unusable.