My provider has both edge and gprs but i've never used edge before, just gprs (never had an edge capable phone)

I got the iphone and in EDGE settings i input the GPRS config I have allways used for my previews phones

internet.itelcel.com

user: webgprs

password: webgprs2002

and by doing that my phone works.. and it shows the little "E" icon on the top.. but if i call telcel they tell me they have no records of me using edge, that ive been using gprs.. whats up with this? do gprs settings go in the edge settings menu of the iphone ?