can i put a tmobile simcard in an o2 blackberry?

[Abbey]

i have a htc hero phone with a tmobile contract simcard, can i put it in an o2 blackberry? please say yes, if not then how do you unlock a o2 phone? heeelp (:

[getha]

No you can't use t-mobile sim in the blackberry mobile until you unlock it from o2 network provider ..You can easily unlock the phone through online providers like TheUnlockSpot.com here they are rendering network unlock code for all mobile models at reliable cost ...You first check that whether the code is available for your mobile model .If yes then pay for it and unlock the phone then freely use it with any GSM sim ...