so if me drois is rooted can i multi task on it?
A GSM Network (ATT, T-Mobile) will allow you to do this.
A rooted phone on a CDMA network is still a phone on a CDMA network.
Also multi tasking is not defined as talking on the phone and surfing the web (using 2 networks).
I don't now if it's been tested but it would be possible to use WiFi and talk on the phone at the same time.
You can also talk+surf if you're using SIPdroid or another VOIP client.
And if you want to talk+surf on AT&T, you have to find a place with 3G coverage, AND manage to not get your call dropped.... good luck with that!
I live just outside NYC and work in Manhattan. I've known for a long time that you can't surf and talk on the Verizon network. The funny thing is, I know many friends and coworkers with iPhones and maybe 3 have said that it's a function they use often.