Over the past month plus, my phone has started randomly shutting down and rebooting. The first couple times were while I was using the GPS, and the phone felt warm to the touch. That was also around the time we started getting warmer, and occasionally hot, weather, and my days involve a fair amount of time outside, although I did not have this problem last summer in the searing heat when my phone was brand new. Over the past month it has happened while surfing online, downloading apps, etc.. (I did not download any new apps around the time this started happening). The phone often feels very warm to the touch when it happens, but sometimes it feels cool, which is the only reason I'm questioning whether it truly is an overheating issue. Today I was downloading a couple apps when it got stuck in a reboot loop for about a half hour before finally just shutting down altogether. I have less than 30 days left on my warranty and I'm wondering if it's worth getting a replacement or just accepting that this may happen until cooler weather sets in. I can't upgrade to a new phone until March. Thanks for any thoughts.