Cingular/T-mobile Sim cards?

HI unlocking phone is nothing but removing network restriction in it due to this you can freely use the phone with any GSM sim ....You can easily unlock your sidekick id mobile from t-mobile network provider using network unlock code .You can purchase code from online providers like WickedUnlock.com for reliable cost .....You can insert your sim through sim slot found at the back of the phone ....