New US T-mobile MDA not working with old sim

[swedbass]

I received a new T-mobile MDA and put my existing (about a year old) sim card in it. It keeps searching for a network without ever finding one. Interestingly, it does receive voicemail notification.

I used the lokiwiz program to unlock it, and when I put another network's sim in it, it gets a signal and I can make a call. But when I put the T-mobile sim back in, it never gets a signal.

In the phone options menu, i I set network selection to manual and search for networks, it will show T-mobile and Cingular. If I select either one, I get a message that the phone failed to register on the network.

T-mobile tech support eventually decided the phone is faulty and should be replaced. Hassle, hassle.

My existing sim card works fine in other phones including my imate Jam.

Anybody experienced the same thing?

[glee719]

Not me. As a matter of fact my SIM is over 3 years old and went through probably many phones already...

T68
T610
Treo 600
Razr
MDA

I always laugh when the T-Mobile tech support suggest that my SIM card could be bad when something is not working. That's probably the most reliable technology that I can see, yet...

[tokuro]

i have an OLD voicestream SIM and works fine.

[swedbass]

Ha!

I returned my first MDA after T-mobile's tech support determined it was defective.

I got a 2nd MDA from the T-mobile store...same problem! I decided to give it a shot and called T-mobiel tech support. After the usual swapping of SIMs and resetting etc. the tech told me to do a "hard hard reset" - holding the voice activation and connection manager buttons and pressing the reset button at the same time. Then select "send" to completely clear the device memory.

After it booted up I had signal and could make phone calls!

UNBELIEVABLE that T-mobile is shipping devices that don't work without expert fixing!