If it asks for IMEI Code means it locked to Network You need to Unlock it,get the Unlock code at here
Wickedunlock and Unlock it.enter the code using the instructions below:
HTC Inspire 4G Unlocking Instructions
Warning :
Do not enter any wrong unlock codes on your HTC Inspire 4G mobile
phones. If you enter over a certain amount of wrong unlock codes on your
HTC Inspire 4G mobile phone, your phone may get hard locked and
sometimes become unusable.
1. Switch ON your HTC Inspire 4G with a
Not ACCEPTED SIM Card.
2. If your HTC Inspire 4G asks for a PIN code, then enter your SIM card PIN and press OK.
3. HTC Inspire 4G will ask to enter an "unlock code".
4. Enter Unlock Code we send to you.
5. Your HTC Inspire 4G is now unlocked.
*NOT ACCEPTED : We mean, to use a Sim card from a network other than the network your HTC Inspire 4G is locked to.