Cricket owned by Leap Wireless is CDMA who also uses Sprint for roaming agreements and actually uses Sprint's network in some areas. You need to read up on Cricket/Leap Wireless and see what they use. Revol USA also is a CDMA provider who has built out their own regional network like Cricket but is a completely private company based in Ohio; who was once called Northcost PCS
Southern Link is the only other provider in the US that uses iDEN for their network; but their a regional company. I also doubt they don't want to pay for all the spectrum issues that Nextel has right now with first responders.
I didn't know if it was Cricket or some other company that had iDEN only network available so thanks for that correction. I can't really check because I am currently and it sucks to load just about any website.
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