I have an existing prepaid account and just bought a droid razor maxx XT 912 3G/4G capable phone....can i use this phone and keep my existing number with a prepaid account? Please tell me how to activate it if so,...please. All it will do when i try is say that it didnt activate ,and ask if i wanna .retry. I cant even access any part of the phone .I cant get past the first screen im so desperate please help... thank you I