I guess I may have found a good feature of windows phone today. From yesterday, I have disabled mobile internet on my mobile since the data pack ran off. Just a while ago when i connected my mobile to laptop for sync with zune, I received mails on the mobile to my shock. Later i browsed internet explorer and whatsapp. Everything worked great. Therefore, i rechecked the mobile network to see if it was off. And yes, it was still off.
Then I realized it might be using my laptop connection which is connected to a LAN network for internet browsing.
So, my question is what happens to mobile internet connectivity when its connected to a laptop. Does it automatically uses any available net connection from laptop or just the via-LAN internet.