Now I must say this is the first time that I have see a pre-order sell out. I’m used to seeing backorder for a pre-order not a sell out . Yesterday Sprint confirmed in a statement to AllThingsD.
Sprint is excited to launch the new Samsung Galaxy 4. We had planned to launch this next generation of the award-winning Samsung Galaxy line-up on Saturday, April 27. Unfortunately, due to unexpected inventory challenges from Samsung, we will be slightly delayed with our full product launch. Sprint is one of Samsung’s largest partners and we are working closely with them to launch in all Sprint channels as soon as possible. We expect to make GS4 available at www.sprint.com as planned on Saturday with Sprint retail stores and other channels receiving devices as inventory becomes available.
Saturday is only two days away so you can Wait for then or pre order from Amazon Wireless here. Samsung has since stated:
Due to overwhelming global demand of Galaxy S4, the initial supply may be limited. We expect to fulfill inventory to meet demands in the coming weeks.