Hello again everybody. I will explain again what's my problem because first time i did't understand anything. So, i switch my n900 from DUAL to GSM. Now, i have a 2G network. The problem is: when i connect to internet to get my mail, update my RSS, talking in messenger or navigate on internet the voice part of the phone is off. I mean when someone tries to call me, even he/she is near me, it says that i'm not reachable and i don't have network cover. It's obviously that i have because i'm navigating over the 2G network, but apparently that blocks the voice function or calling function call it as you like. It's a common problem or it's a setting that i did't manage to find it? I hope someone can explain me what's going on, and i hope it can be fixed. Thanks a lot.