Hello all,

I need to temp use my old 7100T until the Bold comes out. My current Pearl is acting up so I'm just preparing a backup in case something drastic happens with it.

The question is I don't have the SIM card for the 7100T, probably in the bottom of a drawer somewhere. Is the SIM card needed to have it unlocked? I haven't been a Tmobile customer for about two years but was a customer of theirs for probably five years prior. Will they still unlock my phone? I suppose I can go to an internet unlocking service, pay the $40 and have them send me the unlock codes as a last resort.

Obviously, I'm quite the ludite when it comes to these things so any inputs is appreciated.

Cheers.