I'm having the same problem too.. since yesterday after back fr work..
Only 1 smartphone is able to connect to wifi out of 1 PC (wired & wifi, 1 laptop.. another smartphone (wifi)
Not sure if got power outage onnot..

Waste my time on the phone with their tech support.. somehow the guy change wifi channel from 11.. and hard reset the goddamn Thompson router... now it is impossible to connect to the wifi liao.. should have known better.. so obvious that there is a problem with the bloody router.. since internet connection is available..

So pissed off.. and they cant tell me when their Tech Support can come over to change the router.. say need to check this n that..

complete total utter bullcrap from MAxis tech support..

The phone (SGS2) was able to connect b4 changing the wifi channel from "11" to "8"..
After change.. cannot liao..

Then did a hard reset.. i guess default wifi channel is set to "Auto".. cos if i rmb correctly i changed it to "11" during the fiber installation cos "Auto" was giving problems...S2 still cannot connect to wifi..

PC is using LAN cable..
The thing is.. after rebooting the modem n router.. PC/laptop can connect for awhile.. then it will be gone..

Can say 99.999% is their router problem..
Might try back my old router see if can work onnot.. but that thread is too hi tech for me

back to square 1.. hard reset n reconfigure the BS thompson rtr..was able to go online on PC with cable for 1 hr max..then same problem happen again..only phone can connect to wifi n go online...
zzzzz.. so any1 manage to get a permanent solution for thos prob??? any1 got their technician to come over?¿