i searched but i am still a little confused and don't want to waste my money. ok before i buy my curve i just want to make something clear. if i buy an 8310 and have it unlocked to work on my current tmobile service i will be able to use all the features such as google maps and telnav(provided i pay for it) correct????

Yes, I am currently using 8310 on tmobile.

thanks thats all i needed to know, i didnt want to waste my money and not be able to use all the features

Before make your move just have a look of BlackBerry 8300, i feel more comfortable with this!!

I am planning on buying a 8310 too and just wanted to know whether it is possible to attach pictures and video files saved on the device. Earlier I was using the nokia E51 with BBC and there only few formats were possible to be attached to a mail.
Since my E51 was stolen , I am torn between the BB 8310 & Nokia E51. The only thing that stops me from buying the 8310 is lack of Wi-fi and we still don't have 8320 in India.

the 8300 is nice but i wanted something with GPS