I have boost mobile and it's a cheap phone. My friend said she will sell me her samsung galaxy s and I can switch over to boost that they are both CDMA phones and sprint owns boost. Is this true? If so how do I switch it over? Will it matter that she owes a back bill? She said as long as I tell the rep that I bought the phone used from someone that they will do it just fine. I don't want to pay her the $50 for the phone then have it not work.