Haven't had over heating or battery drain issues fortunately (battery is one area it's markedly improved as my previous phone was around 2 years old) The conne

Haven't had over heating or battery drain issues fortunately (battery is one area it's markedly improved as my previous phone was around 2 years old) The connectivity could be better but it's hard to be sure this is the phone and not the network where I live/work. So really it's just the freezes with the software - mainly the built in PDF viewer I mentioned but also the camera at times and the keyboard does odd things where it gets stuck only accepting single key presses (ie no swiping through words). The lag issue seems to appear most when switching back to an app rather than during continuous use.