Sonim Brings NFC, Push-to-Talk to Indestructible Phones
What's best about this deal is that unlike Sonim's GSM phones, which have generally been sold unlocked for hundreds of dollars, the CDMA XP3400 will come with a contract for under $ 100 up front, Jhawar said. The XP3400 will sprout up like a forest of …
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Apple to Sell Unlocked iPhone 4S in November, but No CDMA
Unlocked GSM iPhones can't access CDMA networks, apparently because the capability has been disabled. And even if you buy a locked Verizon or Sprint iPhone, carriers are unlikely to unlock it for you. Turning those locked CDMA phones into world phones …
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Unlocked iPhone 4S Will Only Work on GSM Carriers
US customers will be pleased to learn that the company also plans to sell an unlocked version of the phone. Sadly, unlocked doesn't mean you can use it on any network you want (despite the fact that it has a CDMA/GSM radio), just that you won't have …
Read more on Tom’s Guide

Unlocked iPhone 4S not available until November, won't support CDMA
If you're a globetrotter who is toting an unlocked phone, you aren't going to call a local CDMA carrier to have your phone temporarily activated. Instead, you'll buy a pre-paid SIM card, and pop it in. Of course SIM cards are the turf of GSM. …
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