France’s second largest mobile operator, SFR, jointly owned by Vodafone (NYSE: VOD) and Vivendi (EPA: VIV), said on Tueday it had signed on 250,000 subscribers to contracts giving them unlimited access to the mobile internet since the launch of its flat rate “IlliMythics” data plans two months ago. Dow Jones reported that 52 percent of the subscriptions were new customers, while the remaining 48 percent were SFR customers who had switched plans.

SFR had initially targeted 100,000 users for the service--which while touted as unlimited, doesn’t allow VoIP or P2P applications, or using one’s mobile as a modem. The launch coincided with Apple’s iPhone roll out in France, and industry players saw it as a way for SFR to compete with France Telecom’s Orange which is the exclusive carrier of the iPhone. SFR launched 6 third generation phones at the same time they released their IlliMythics plans. The plans last two years and start at 39 euros a month for flat rate data access and120 voice minutes, and rise to 69 euros a month for flat rate data access and 350 voice minutes.