Pre-orders for the Samsung Galaxy S4 will begin on various U.S. carriers this week, but most people don’t know when the phone will actually launch. A leaked document from Staples may shed some light on that problem. The image above, provided to Engadget, suggests that the Galaxy S4 will be available from AT&T on April 26, from T-Mobile on May 1 and from Verizon Wireless on May 30.

The image also says that the dates are “tentative” and that they are the “earliest dates sellable inventory arrives in stores,” which means the days could change at any time. Staples also says that reservations through one of its 500 mobile store locations does “not guarantee [inventory] on launch dates,” so it’s also possible that very limited quantities will arrive on the aforementioned dates.