Fearzone I guess every carrier will ask you for the deposit as you have got ur credit card just recently but most probably sprint will ask less than any other services. If you don't have that much financial issues then I suggest you to deposit 500 and get AT&T, their network and roll over minutes are very positive aspect. Regarding roaming charge of sprint, it is not like that if you go outside ur state and u have to pay roaming charge. But in some areas where the signal of sprint is poor or no signal then in that case you have to pay roaming charge if u use ur cell phone. I have used sprint for abt 8/9 months but was not satisfied, the network is poor.