wow that sales lady never told me that it would only run on edge. she only said that i can use an unlock phone. thanks for the heads up now i really have to get a T-mobile phone now. though i'm still going to root my current phone.
yup,she was partially right,you can use any unlocked phone for voice,text and edge. however,att and t mobile use different frequencies for 2g,3g,and 4g,and the inspire does not have the correct hardware to recieve the 2g,3g,or 4g signal on t mobile. on occasion i myself use an inspire,and a att one XL on my prepay t mobile account.
the inspire is basically a "made for att" desire HD,and as such has alot of fun roms and such available for it.
i do not think most folks intend to decieve you when discussing using gsm phones on other networks,they just do not understand that the hardware sometimes is different. back in the days of old school flip phones, voice,text,and 1x(edge) were all there was!
i would strongly recomend the htc sensation(im an htc fan) for t mobile,its a wonderful phone with lots of development,and will get 4g just fine(if you get a t mobile version). that is what i typically use on my t mobile line.
edge data sucks,but it IS better than nothing until you get something else. its fast enuff to check email,facebook status,play games that store their data on a server. its comparable to a fast dialup.
holler if you have any questions on rooting your inspire.