BANGALORE (Reuters) - Navigation device maker Garmin Ltd beat Wall Street estimates with a 70 percent jump in quarterly profit as revenue in its automotive and outdoor/fitness segments climbed, pushing shares up more than 5 percent.

Garmin's fourth-quarter profit rose to $307.3 million, or $1.39 cents a share, from $180.3 million, or 82 cents a share, a year ago. Excluding items, earnings were $1.31 a share. Revenue almost doubled to $1.23 billion.

Analysts on average expected the company to earn $1.11 a share, before items, on revenue of $1.03 billion, according to Reuters Estimates.

Garmin benefited from strong holiday sales, with the number of units sold rising to more than 5.5 million during the fourth quarter — only slightly below the total number of units sold in all of 2006.

The company's shares have dropped about 35 percent since Garmin reported third-quarter results in late October last year, mainly due to stiff competition from Dutch rival TomTom NV and a sluggish U.S. economy fueling concerns about future growth prospects.

For 2008, the company expects to earn more than $4.40 a share on revenue exceeding $4.5 billion. Analysts expects earnings of $4.41 a share, excluding items, on revenue of $4.23 billion.

"The guidance is solid...But it appears that margins are lower than what we had previously modeled," Needham & Co analyst Richard Valera said.

Garmin on Wednesday also said its board authorized the buyback of 5 million shares.

NUVIFONE ON THE HORIZON

Since its third-quarter earnings announcement, Garmin has lost a bidding war for digital map maker Tele Atlas AS to TomTom and also announced the launch of its touchscreen nuvifone, which is a mobile phone loaded with navigational technology at the heart of the device.

Garmin expects the nuvifone to be released during third quarter and said initial unit shipments will begin during the second half of 2008.

Needham's Valera said nuvifone may not have any material impact in 2008. He has a "buy" rating and a price target of $85 on the stock.

Shares of Garmin rose to a high of $73.29, before falling back to trade up more than 1 percent at $70.40 in morning trade Wednesday on Nasdaq.

TomTom's stock was trading up more than 2 percent at 39.65 euros on the Amsterdam exchange, indicating Garmin's strong quarterly results bode well for the entire industry.

TomTom will report fourth-quarter results on Thursday.

COMPETITION TROUBLE

Garmin, the market leader in the United States with around 50 percent market share, is facing a threat from TomTom in its stronghold.

According to a U.S. market research firm, the Dutch company had sold more units than Garmin in November, 2007, due to lower pricing.

"Time will tell if that share they gained in November is their's or whether it was a fleeting response to great promotional prices," Oppenheimer & Co analyst Yair Reiner said.

Deutsche Bank analyst Jonathan Goldberg said TomTom may prove to be more aggressive than previously expected. "In fact, they got a little too aggressive and ran out of products in the fourth quarter," he said.

Garmin is fighting back and trying to do in Europe what TomTom is doing in the United States. The company is trying to improve its current 20 percent market share by acquiring European distributors.

"I don't think they can surpass TomTom (in Europe), but I think they can narrow the gap and the process has already begun," Goldberg said.

(Reporting by Purwa Naveen Raman; Editing by Pratish Narayanan)

Copyright Reuters 2008. All rights reserved. Users may download and print extracts of content from this website for their own personal and non-commercial use only. Republication or redistribution of Reuters content, including by framing or similar means, is expressly prohibited without the prior written consent of Reuters. Reuters and the Reuters sphere logo are registered trademarks or trademarks of the Reuters group of companies around the world.