CDMA SIM Cards Rise Again
Posted in: Today's ChiliAh, the dream of the CDMA SIM card. For folks who aren’t cell phone geeks, SIM cards are part of the standard that lets GSM phones work on different networks and let people buy “unlocked” phones. Most CDMA phones, like the ones used by Verizon, Sprint and MetroPCS, don’t have SIM cards, so they aren’t quite as easy to swap between networks. (Sprint and Verizon phones with SIM cards are typically dual-mode CDMA/GSM phones – the SIM card only affects the GSM side.)
At the Qualcomm booth here at the CTIA Wireless trade show, Qualcomm was showing the Samsung Mpower 699 – a CDMA phone with a SIM card! The card in this case is called an OMH card, and it’s an evolution of the RUIM card, which in turn was the first attempt at a CDMA SIM. According to a Qualcomm rep, OMH allows 3G data access and services, which the RUIM standard didn’t allow.
Sadly, we will probably never see these open-market, unlocked CDMA phones on our own CDMA carriers in North America. Carriers have to voluntarily sign on to the plan to make the phones available, and while carriers in south and southeast Asia have been amenable, Sprint and Verizon have shown absolutely zero interest in allowing unlocked, open-market phones to run on their networks.