How Will GSM iPhone 4S Roaming Work With CDMA Primary Carriers?

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When Apple first released the Verizon CDMA iPhone 4, some guys taking a close look at the phone’s components noticed that the chipset for the CDMA radio also technically supported GSM. While that model was stuck doing CDMA-only, the iPhone 4S fulfills on that dream of a dual-mode radio, enabling users who have a CDMA primary carrier to roam on GSM networks while abroad. That’s the idea, anyway; how will it actually work out?

First off, you’ll obviously need a SIM, which you’ll have to get from the GSM carrier whose network you wish to use. The only sticking point here is that the iPhone 4S takes a micro-SIM card, so if the carrier only offers larger, standard-sized SIMs, you may be stuck trimming one down.

The other main thing to prepare for is to make sure your primary carrier has enabled the phone to support GSM roaming. If you get your new 4S from Sprint, it should be capable of such a thing from the start, but Verizon users will need to make a special request to have their phones unlocked. Before the carrier enables GSM service, you’ll have to have maintained your account in good standing for about two months.

Update: Now Sprint is saying its 4S won’t come with GSM enabled, either.

Source: MacWorld

Via: TiPb

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About The Author
Stephen Schenck
Stephen has been writing about electronics since 2008, which only serves to frustrate him that he waited so long to combine his love of gadgets and his degree in writing. In his spare time, he collects console and arcade game hardware, is a motorcycle enthusiast, and enjoys trapping blue crabs. Stephen's first mobile device was a 624 MHz Dell Axim X30, which he's convinced is still a viable platform. Stephen longs for a market where phones are sold independently of service, and bandwidth is cheap and plentiful; he's not holding his breath. In the meantime, he devours smartphone news and tries to sort out the juicy bitsRead more about Stephen Schenck!