Carrier IQ, a Mountain View start-up that tracks data collected from a mobile phone user’s experience, has raised $4 million more dollars, from Spanish venture capital firm, Nauta Capital.

The company, launched by WebTV co-founder Bruce Leak, is now run by Mark Quinlivan, who is former chief operating officer of edocs (acquired by Siebel).

Carrier IQ’s analytics software is embedded in your phone, and collects data on just about every level, including service and network layer, radio frequency, Internet protocol and even downloaded software — and delivering it to the carriers. Previous backers include Accel Partners, Charles River Ventures and Mohr Davidow, who invested $10 million last year.

We’re checking to find out more details on the investment, and whether this represents a separate round of capital, or is just part of the previous one.

In a statement, Nauta Capital said that CarrierIQ has “has quickly gained a strong foothold with leading CDMA operators,” but did not mention which ones.

Nauta said this is one of the first transactions of Nauta’s recently closed $65 million second fund, Nauta Tech Invest