yeah...Vouge....i would have to see it type of thing.
or you could take it to the apple store, genius bar and they should be able to help you out.
t-mobile will know what type of phone you are using.
but they don't care.
my mum and my 55 year old, old man are using hacked iphones.
they still have trouble figuring things out, even though it's in spanish, but they are learning.

they are on a family plan with my little sis, (also hacked iphone user)
it's honestly not that hard, but first time can be daunting.
just follow instructions. you can't really f-up the phone. it's only software.
if you make a mistake, reset the phone, and try again.
it's not like before where you had to open it up, the first hacks were
good luck.