with CDMA networks you have 2 series of 10 digit numbers that are used for programming. One is your phone number with area code and the other is a generated so called routing number with area code that could possibly be different from the phone # but not always. The one that is used for data (SIP) is the one that is listed in your phone as the MSID. After the phone has been programmed and saved SIP password will be blank. It disappears after it's saved. 4112 is not the correct Reg ID in all areas either but in some that is correct. The trick is exactly as stated above, once a PRL has been done you will have to enter a 6 digit code rather than 000000. If you can get into your programming by way of 000000 a PRL has not been done. Also the
MSID@uscc.net is correct and the password is just the MSID. Again after programmed and saved it will not be there when you go back in, at least visually. The phone keeps it.