Ill try it but what is msl
If you have an extra phone of yours you used to have on your account.. do this.. dial
1. ##626*
Enter 587846
It should take you into your phones programming menu (old phone)
There you will find your necessary info to reprogram your s3.
Are the steps a metro rep will do.. how can I assure you? Im a MetroPCS rep in SoFL.
Ave any question.. message me on kik:armaestilo