All I know is that this iphone 6s is the best phone I have ever had, Ive had samsungs and a htc and both where endless problems of software issues, sd card problems and battery life sucked badly.
I was constantly having to reset the samsungs because of the problems and using the sd memory because the phone only had a measly amount of storage after all the bloatware that samsung added was a nightmare! Sd card always messed up and I tried numerous ones in both. Htc spent more time in the repair shop of tmobile then being used it was useless. Ive had an iphone 4 back when they where released which was dependable and did everything I needed and the iphone 6s is again dependable and does everything it says without issue, great phone and the quality you would expect from apple, wont buy another brand now I’ll stick to what I know works not gimmicks lol