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Since its 2007 launch, the iPhone has been available in the U.S. only to subscribers of AT&T Inc., which uses a cellular network technology called GSM.

The Wall Street Journal reported late Monday that Apple plans to release an iPhone this year that would work on CDMA networks — a technology used by latitude d610 battery Verizon Wireless and Sprint Nextel Inc. in the U.S., as well as some carriers overseas.Apple and Verizon declined to comment on the matter. AT&T spokesman Mark Siegel said the iPhone will be an important device for the company for quite some time.

Brian Marshall, an analyst for Broadpoint AmTech, estimates AT&T pays Apple $450 per iPhone, more than the $300 he estimates all other carriers pay per device.But having more than one U.S. iPhone carrier can only help Apple, Marshall said. In the U.K., Canada, Brazil and France, the most recent markets to switch from a single iPhone carrier to multiple Dell latitude d830 battery , unit sales took off when customers on more carriers could choose the phone.

Morgan Keegan analyst Tavis McCourt cautioned that it’s not certain that Apple and Verizon could agree on terms for an iPhone that runs on CDMA networks. CDMA capability could also be used to get the iPhone onto the networks of China Telecom Ltd. and South Korea’s SK Telecom of Dell inspiron 1720 battery .Several analysts said it appears AT&T will still be the only iPhone carrier in the U.S. at least through 2010.

Marshall believes Apple extended the deal until 2011 in exchange for a flexible data plan for the iPad, Apple’s new tablet device. People who buy iPads with cellular data connections can pay AT&T month by month for service, instead of having to sign a contract, and choose a $15 or $30 monthly plan based on data consumption.

Apple shares rose as high as $237.48 on Tuesday, an all-time peak, before pulling back to $235.85, a 1.5 percent gain for the day. Apple’s stock has jumped about 13 percent this month in anticipation of the iPad launch, which begins Saturday.Shares of Verizon Communications Inc., which owns a majority of Verizon Wireless, rose 2.6 percent Tuesday, while the stock of its partner Dell latitude d630 battery , Vodafone Group PLC, edged up 0.8 percent.

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