Android guy
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I had been an Android user since 2011, broken up by a short stint with Windows Phone. I can say that iOS is much more smoother than every Android version that I had used prior. I don't have any experience with Nougat though. I really haven't had any bugs or issues with iOS, save for the betas having poor battery life at times. It's beta software so I'm not gonna hold that against Apple. I think notifications is the biggest thing that needs to be fixed in iOS really. Beyond that, I can't really find any major glaring issues with it, at least in my usage.
I started getting fed up with Android toward the tail end of my LG G3 usage, and it finally came to a head with the Note 5. I went through 3 replacements and I finally said enough was enough. This was also around the time of the Note 7 debacle, where airlines were prohibiting that phone onboard and even some were making everyone with any Samsung device turn them off. I had a busy travel season coming up, so I decided to trade in my third replacement Note 5 in on a 7 Plus, and thus I completed my Apple integration circle (Mac, iPad Mini and iPhone). It is possible that with Nougat, Android has improved but I'm really enjoying iOS right now. I think I will stick with this for the foreseeable future. iMessage is amazing and I wish Google could come up with a competitor. I didn't realize how good iMessage actually is, until I switched over. The vast majority of the people that I know, have an iPhone, so it makes it easy for me to connect with them due to iMessage. For those who don't, I just use WhatsApp. If I get a second line though, maybe I'll pick up a Galaxy again. The Note 5 burned me though, on Samsung. I'm hoping the S8 line doesn't have any issues, going forward.