HTC HD2 as a AT&T GoPhone

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I'm trying to find out if anyone has tried doing this. For some reason when I install the sim from my gophone in the HD2 it doesnt say that there is no sim present, but it also wont give me the option to unlock the phone or make a call. If I hit the phone button nothing comes up. Oh yea, Mines the T-Mobile US version >_>

does it work with a regular t-mobile sim card?

Some phones require sim unlock with original SIM carrier in it - once code is typed in then it easily recognizes other SIM cards (AT&T in your case)

I have the unlock code for my phone. I just cant get the panel that asks for it to come up.

Oh and no I cant use it with the regular card because I have to go to the local tmobile shop on monday. I was told by tmobile that some how my sim number must have been a reissued number because it was registered to someone else and now I have to go pick up a new sim card.

My AT&T card was not recognised by my 9193 at first.

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I had to put it in and try several times. Pushed it way down in the slot after lightly using a pencil eraser on the contact surfaces and off it went. Hasn't missed a beat in a month.

It's odd, cant seem to get it to work .. It doesnt say there is no sim like it does when I completely take it out, but it still wont let me bring up the phone panel. I've tried wiggling it, Putting it in 50 different ways... nothing seems to work.