i am having trouble making calls on my unlocked htc hd2 phone. even with a signal, calls cannot be completed. the phone is running on android 2.2 R 188.8.131.52 G 15.42.50 11U D 3.14.04666 8G AND SPL-3.03.HSPL XE Is there something i need to change. i can only run android from sd only. all other attempts otherwise results in freezing on T-Mobile "sticking together" screen. and yes i am new to all of this.