Hi. So I have a question regarding cricket. my boyfriend has a galaxy s4 and he bought it for cricket in Feb. Now since at&t bought cricket the current phones are not going to work anymore so he has to purchase a new phone. Now, cricker gives him 100 for his phone which is a joke. So me and him are wondering if people that have sprint or verizon can use this phone so he can get atleast 250 for this phone????? Like can a cricket phone be flashed to a sprint/verizon phone?