so my first S3 LCD screen cracked and i went out and bought a used S3 off CL (i even called sprint and they said it had a clean ESN) i get home to activate it and then won't because the guy called and reported it lost.well what i am wondering is can i just remove the motherboard from my old s3 with the cracked screen and swap it with the bad ESN phone? would i have to also swap out the radio as well or just the motherboard?