If other SIMs are working and you are able to call someone your phone was unlocked when you got it.
If your SIM isn't working it could be that you need a new one from your provider.
I had that problem years ago. My phone was too new ...or my car...
If you buy this phone - do it it's great :D - you should at least upgrade it to CM10.2 and get rid of that T-Mobile bloatware.
Just my 2 cents
I installed the german layout (because I'm from ger) from the first post to switch Z Y, but I can't use any symbols over the ALT-key.
This isn't working with the default CM10.2 (nightly 20131111 and before) sec_keypad.kl also?!
thanks for the info. now for the million dollars question... how do you downgrade the kernel on Android? does this require flashing a new custom ROM?
Yeah, that's it, BUT I would wait - like you mentioned - for the ICS upgrade and try than again....
for PPTP you'll need kernel 2.6.35.x!
Otherwise you'll be able to get a connection but your data transfer will break down after 5sec-3min!
I will edit this post with a link to "Issue 4706: Droid phone PPTP VPN dying after a short while." ...