I recommend going backwards one generation, to the Samsung Galaxy S5. This is the phone I have, and I love it. The battery life is fantastic: I can easily go

I recommend going backwards one generation, to the Samsung Galaxy S5. This is the phone I have, and I love it. The battery life is fantastic: I can easily go two full days on a single charge. I'm still using the OEM firmware too (Sprint version), which does have its share of bloat, but I have a bunch of the built-in bloat disabled. If you haven't done that yet, you need to. Moreover, if my battery does die early because I was doing too much with it, I have a spare battery in my backpack I got on Ebay for less than $10. I can easily pop that in and have a full charge again, without messing with some stupid USB-attached battery pack. On top of that, the S5 has two other very important features that the S6 lacks: a microSD card slot, and being water-resistant (IP67 I think). The S6 was a massive step backwards. Why on earth did you even buy it, when the previous generation was so obviously superior in every way? Anyway, my recommendations in a nutshell: buy a Sprint S5 on Ebay for $100-150, and sign up for service with Ting or another Sprint MVNO.