Updated below: Nokia (NYSE:NOK) has made another mobile content/marketing buy: it has bought Boston-based mobile marketing company Enpocket, though the price is not clear, WSJ reports. The company was founded in 2001, and got $2 million last year from venture debt firm Leader Ventures. It has received a total of $25 million in venture capital funding. The 120-person company works with Sprint Nextel, Vodafone and Bharti Airtel of India, and has ad clients such as Hyundai and Pepsi.

This Nokia buy follows its buyout of social net Twango, and online/mobile music service Loudeye, and its efforts to launch content and applications on its new handsets.

Updated: it has been officially announced, and Nokia’s Mobile Advertising business unit will be headquartered in Enpocket’s Boston office and Enpocket CEO Mike Baker will lead Nokia’s new unit, according to bizJournals.