Have been using PCCW for long (to be exact, it should be : Sunday -> PCCW -> CSL).
As I wanted a nano sized sim, recently I've replaced the old PCCW SIM with the new CSL NFC-OCTOPUS SIM (8985219咭) at one of the HKT branch/shop. FYI, I just did a sim card replacement w/o any mobile plan change (have been using 4G plan for long).
Surprisingly, the reception improved a lot (both 4G and 3G). I can get 4G signal (very usable) at those locations of which the old sim could only offer me 3G (H+/H). In addition, I've also tried the new sim on a 3G only tablet and now I can get sustained H+ signal. In the past, I were having H signal at almost 50% of the time (which is so ... slow). H+ is very usable and H is just like hell.
While I'm okay with 5219 咭, would those 5200 咭 be even better ... ??