Siri not working on EDGE ??? how abt wifi ?

guys, i have installed Siri to my JB iphone4. i have unlocked my iphone using Gevey sim , so i dont enjoy 3g. its just EDGE.

Now, when i start Siri, after giving some command, it looks for the answer, but after couple of seconds, it says "I am not able to connect to network"

so looks like it needs 3G data connectivity..right ? so in this case those who are using gevey sim to unlock phone, wont b able to use Hacked siri.

So, i was wondering, is it possible to go thru wifi ? atlest ppl like us can use siri while they are on wifi.

Help appreciated !