JP Morgan upgrades InfoSpace Inc. (INSP

) to overweight from neutral.

Analyst Imran Khan says he has increased his confidence in the short- and long-term fundamentals of the company's mobile business. He believes the company's investments in improved mobile distribution and content during 2004 will help the company post continued strong growth in 2005.

He notes his channel checks indicate that ringtone downloads are growing 20% sequentially. With $284 million in cash (at $7.50 per share) as of the fourth quarter, and an additional $83 million ($2.19 per share) from the settlement of its derivative case in March, the company has strongest, most flexible balance sheet of all ringtone competitors.

Based on its strong balance sheet and promising growth prospects, Khan upgrades.