For wireless subscribers, commitment is out and short-term relationships are in, the Associated Press reports. This year, customers have been making a big shift away from two-year contracts toward “prepaid” cell phone service, which often costs less and does not require contracts. This is happening even though contracts are needed to get popular phones such as the iPhone and the Droid. Now prepaid service looks like it will get even more attractive, with further price cuts. That’s because wireless carriers have hit a wall when it comes to finding new customers who will sign contracts. “I would love to have an iPhone. I just can’t swallow the $70 or more bill that would come with it,” said Jeff Finlay, a 45-year-old stay-at-home dad in San Antonio who uses a prepaid plan.