Will a unlocked/jailbroken iPhone work on Verizon Wireless or Sprint Wireless in US?
Answer is No.
You cannot use your iPhone in Verizon or Sprint network as there are not GSM carriers. Sprint and Verizon wireless uses CDMA technology they don’t use SIM cards. AT&T Wireless and T-Mobile USA are the chief GSM carriers in the United States. GSM and CDMA phones are not compatible with each other.
See what are the primary advantages and disadvantages of iPhone, iPod or iPad jailbreaking.