Get your beach chair and sunscreen ready for the next iPhone launch circus at the Apple Store. Or don't.That's the question facing consumers over a next iPhone debut, presumably dubbed the iPhone 5S, or the mountain of alternative mobile devices.Apple is getting ready to crank up production on its next iPhone, according to a report. The device would be available for a possible summer launch, according to The Wall Street Journal report, citing people familiar with the device's production.This iPhone launch is like no other. Apple's stock has languished far below its $705.07 all-time trading high and sentiment has turned negative on the company whose stock is down 39% as rivals stage endless mobile assaults.Apple's next iPhone is coming along as electronics behemoth Samsung has shown off its next-generation Galaxy S4, expected available near the end of April. And consumer choices are vastly expanding, with HTC's One phone also slated for April and BlackBerry's Q10 keyboard-sporting phone expected around April or May.