While American carriers are lengthening upgrade cycles and pushing people off unlimited data plans if they want a subsidized device, companies across the pond are actually looking to get customers to trade up more often. Vodafone's Red Hot isn't quite as flighty as JUMP, but the basic premise is the same. Rather than buy the latest high-end smartphone, you rent it. Then when the time comes, you simply trade it in for the new latest and greatest. While Phones4u lets you switch handsets impulsively every six months, Vodafone goes with a more rea
