Your password is probably your issue! in august this year metro made some changes where as your password use to be metropcs..Now its your MEID/ESN #converted to hex decimals.....go here its the convertion tool just follow the instruction for METRO PCS
http://xxx.whiterabbit.org/android/....use converted number as your password.
NOTE:Change the xxx to www in above address did not want to post live link.Make sure you save passwood, because if you reset phone it will revert back to old password!