Not yet! Cel-Fi systems are only sold in markets with Operator approval (because Cel-Fi is a true extension of their network). Over 160 Operators globally have approved and embraced the Cel-Fi solution. If you want your Operator to offer Cel-Fi, you should ask them for more information about where they are as a company on approval of the Cel-Fi solution.
Sprint: The new 3rd generation Cel-Fi systems (PRO and DUO) are now technically compatible with these Operator networks, pending their adoption of VoLTE technology (Voice [calling] over LTE) which is reportedly underway. For more information please ask your Operator about VoLTE and their adoption of Cel-Fi.