Verizon Wireless hopes the new phone will attract customers put off by the iPhone's lack of a traditional keypad -- the Voyager hinges open to reveal a small computer keypad and a second screen.
However, analysts beleive that the Voyager may attract existing Verizon subscribers who do not want to switch service providers, but is is uncertain whether it would hurt iPhone sales.
The battle for cell phone buyers' hearts this holiday shopping season is shaping up to be even fiercer than usual, as rivals to Apple and AT&T launch new challengers.
Verizon also introduced Juke, an ultra-narrow phone that comes in three colors and is shaped like a chocolate bar. The phone, made by Samsung, is less than 1 inch wide.
It also unveiled another LG phone, the Venus, which comes in black and pink, and has a phone keypad that slides out from under a touch screen. As with Voyager, it vibrates when a user taps a menu option on the screen.
Verizon Wireless would not give exact pricing beyond saying each phone would target a different segment and range from under $100 to about $400. The iPhone costs $399.
Venus and Voyager both have 2-megapixel cameras, and high-speed wireless connections for fast music and video downloads, and a slot for 8 gigabytes of extra memory. The iPhone has 8 gigabytes of built-in storage.
Venus and Voyager will launch before the end of November.
The cheapest phone in the range is the Juke, which is narrower than any U.S. phone so far and will go on sale on October 19.
The Juke slides open to reveal a tiny keypad and comes in dark blue, red and teal. It has dedicated keys for playing music but does not have a high-speed wireless link.
Verizon Wireless said it expects to attract more fashion-conscious young users to Juke than those who want to constantly e-mail or Web-surf on cell phones.