I have flashed (Vanilla + Combined) my "recent" N900 yesterday and installed CSSU-thumb.
I also installed a few (stable) applications, none of which having anything to do with internet connection or phone calls...

Of note: I use only cellular connection, no wifi at all.


Everything was rather smooth and working as intended, but then I made a phone call, and notice it cuts the internet connection off.
So after the call I tried to re-establish my connection, but now it's asking me if I want to allow data roaming.
If I say no, then no internet connection for me (whereas I could browse and download at will prior to making that call)...

It's an issue I have initially when I got the phone, and that's the main reason I did a full reflash.


Are those normal behavior ?
- Phone calls cutting the (cellular) internet connection
- Data roaming being needed afterwards

What can be done to squash those pesky problems ?