I will be looking to replace my G3 with either a G5 or S7 (leaning towards S7 edge), and would like some input on unlocked vs carrier branded device. While it seems that a lot of folks prefer an unlocked phone, I'm concerned about potential issues with warranty service. When I had an issue with my T-Mobile branded phone, the provider overnighted me a new replacement unit and provided a prepaid label to ship back the defective unit. In contrast, one of my friends bought an unlocked version of the same phone and when his screen went bad, he had to first send in his defective unit to the manufacturer (LG) and waited around 3 weeks to receive a replacement. Is this a valid concern? I'm not planning on swithcing carriers (sticking with T-Mobile) and will be buying the phone for full price. Thoughts? Any other pros and cons?