I am using iPhone 6 plus 64gb since last 6-7 months.
I went for 6 plus and not 6 due to its bigger screen and bigger battery i guess approximately 2900mah. I use my phone a lot and it gives me more than 12 hours of battery life with heavy usage with 3g on all the time and net surfing all the time.
before that i was using note 4 , q10, lg g3 , samsung s4 , iPhone 5 , z10 etc etc
Unfortunately Samsung s4 screen was broken by one of my friend , and lg g3 sim slot was destroyed by me while putting in the nano sim with micro sim adapter into sim slot when i took it out the plastic adapter took one pin out of it