AT&T Boasts About On Time Galaxy S4 Release Adam Mills04/25/2013 In the wake of in-store Samsung Galaxy S4 release delays from Sprint and T-Mobile, AT&T has sent out a message that boasts about how it will have the device in-stores on the date it announced while reassuring future buyers that it will have the device, in-stock, on April 27th as promised. While the Samsung Galaxy S4 was originally supposed to become available in the U.S. starting tomorrow, the carrier that promised that date, T-Mobile, was forced to delay its release until April 29th. That date applied to the online availability and not the in-store availability. In-store availability, which was originally slated for May 1st at T-Mobile, has today been pushed all the way back to May 8th and May 15th.Advertisement Read: AT&T Galaxy S4 Arrives Early. The Galaxy S4 will arrive on schedule at AT&T. Sprint, another carrier that is set to release the Galaxy S4, was also forced to push its in-store availability from April 27th to a now undetermined date. The carrier remains mum on any specifics.Advertisement And as the battle between carriers heats up, one of Sprint and T-Mobile’s biggest Galaxy S4 competitors, AT&T, has taken to Twitter in an effort to not only capitalize on the delays of its competitors but to also reassure those that may have already been planning to buy an AT&T Galaxy S4.Advertisement In its message, AT&T says that its in-store release for the Galaxy S4 is on track for April 27th, a subtle jab at Sprint and T-Mobile. The message also is meant to soothe those who may have been worrying that AT&T might be forced to shift its release date back further into April or even worse, into May like T-Mobile. We are on track with our planned 4/27 in-store launch of the Samsung #GalaxyS4 only available at our stores. soc.att.com/15QKlYl — AT&T (@ATT) April 25, 2013 The AT&T launch will go on as planned it seems and that shouldn’t come as too much of a surprise as the carrier has become the first U.S. carrier to put the Galaxy S4 into the hands of consumers.Advertisement The Galaxy S4 has arrived on the doorsteps of those who placed a pre-order today, ahead of its eventual release this Saturday. The AT&T Galaxy S4 will be followed by the U.S. Cellular Galaxy S4 which goes on sale, online, starting tomorrow, April 26th. Verizon, who is AT&T’s largest competitor, will be releasing its Galaxy S4 more than a month later with a release date set for May 30th.