Some people are afraid of commitment, and that includes vowing to stick with a carrier for two years. Thankfully, the list of choices keeps on growing for those who'd rather use contract-free devices, and the new TextNow mobile phone service is a fresh option. If the name sounds familiar, that's because it began its life as a standalone app for making free calls and sending texts via WiFi. Staying true to its roots, the new service piggybacks on Sprint's 3G and 4G network for an internet connection in the absence of WiFi, so you can use a TextNow-powered Android phone wherever the carrier has coverage. Yes, that's wireless phone service over IP, and the outfit claims it's the world's first all-IP mobile operator. Device choices are limited to a Nexus S for $90 and a Galaxy S II for $120, but as plans begin at $19 per month, it might still be worth checking out, especially if you're on a budget.