No, I don't think those issues are related. Those users seem to have their issues native to cellular connection.

The issue here could be a number of things: a) an issue with the device handing over from WiFi radio to the 3G, or 2G radio b) an issue with the network - if he had a PDP context [1] initially and then swapped to a WiFi network, or if his device is handing over from 2G to 3G, or even something as simple as his network not having 3G coverage where he is.

Those other threads seem to be different.

His problem is described as "lose of internet when switching from WLAN to 3G".

I want to find out if he connecting to 3G only, or connecting to 2G or 3G (whatever is available.)

Hope that helps,
bernard.

[1] http://is.gd/cf6Ok