Alltel customers brought under the Verizon umbrella have been getting more and more signals that it's time to let go of that legacy phone. The latest red flag is a letter that Droid-Life understands is making its way to holdout customers. According to one copy, Verizon will start shutting down the remnants of Alltel's data service on or near January 10th, 2013. Alltel's mobile data should be completely inert after April that year -- and those still clinging to the past will be down to basic phone calls and SMS until they get Verizon-blessed devices. At least corporate customers are getting incentives to cross the divide, so you can't accuse Verizon of forgetting to use the carrot along with the stick. We'll admit that we aren't exactly mourning the eventual loss ourselves: customers by that point will have had four years to make the leap, which in this era can feel like an eternity.