I have a samsung flip phone that I use as a spare phone. I changed the phone number on this phone but didnt write the number down thinking I would just go into the phone information area and pull the number out that way...WRONG!!! The phone locked after activation and I have not been able to use it since. Is there anyway to unlock the phone? Or even how do I reset it so I can go back to using this phone when in areas that my other does not pick up???