If you only used the phone for incoming and outgoing calls then obviously there is some mistake by PCCW. However, I have never heard of a case where PCCW's billing system did actually make such a mistake. So I conclude that it is most likely that you did actually use the phone for some services apart from voice calls. And if you did use it then you have to pay.
Are you really saying that you did not use the phone for any services except incoming and outgoing voice calls?
Source: Apple SupportWhen airplane mode is on, appears in the status bar at the top of the screen, and no cell phone, radio, Wi-Fi, or Bluetooth signals are emitted from iPhone.
When airplane mode is on, you cant make calls, send text messages, surf the web, or check for new email.
Actually earlier I did not connect to a Wifi network, just activated Airplane mode then Wifi and got a list of (secured) networks. Will check at home tonight if I can actually surf the web or not.
If it does work it's not a bug, it's a feature.
UPDATE: Wifi does work in Airplane mode, it's a OS 2.0 feature:
I have a 2G and started on 1.1.something, so that's where I must have seen the error message.When airplane mode is on, appears in the status bar at the top of the screen, and no cell phone, radio, or Bluetooth signals are emitted from iPhone (and GPS is not available). You can't make calls, send or receive text messages. If you want to use Airplane mode and Wi-Fi or Bluetooth simultaneously you can. (Note that using Wi-Fi and airplane mode simultaneously requires iPhone OS 2.0 or later. Using Bluetooth and airplane mode simultaneously requires iPhone OS 3.0 or later.)
Last edited by Raccon; 28-12-2009 at 05:54 PM.