Don't worry, you aren't the only one searching for a last minute Father's Day gift. If your dad is into tech, you might consider swinging by Best Buy on Sunday. The electronics chain is cutting $250 off all Apple Watch models with the purchase and activation of any iPhone 6S or iPhone 6S Plus. That means you'll be able to snag the 38mm Watch Sport for $49 (with the purchase of a new iPhone, of course). The deal, available online and in stores starting Sunday, includes activation on AT&T, Sprint or Verizon. At its Worldwide Developers Conference on Monday, Apple introduced the next version of the software powering its smartwatch, WatchOS 3. Available to the public in the fall, it promises a new interface and the ability to load apps much faster -- and it might finally make the Apple Watch a must-have gadget. Apple is also expected to unveil new iPhones in the fall, a reason Best Buy may be looking to clear out soon-to-be-outdated iPhone 6S and 6S Plus models.