Holy cow! This new iOS 12.1.1 has breathed new life into my old 6 Plus, my main (daily) phone. I can't believe it. I refused to listen to all of the reports about good performance of the new OS on old phones, but now I'm a believer. Thank you, Apple! I can use this wonderful phone for at least another year, hopefully two. What value. I love the phone: better phone call quality than any later phone I've tried, headphone jack, light, thin (compared to all the "better" phones), home button feels great (and it has a home button), screen is still one of the best I've seen (including the OLED phones). My phone: 6 Plus, had the battery replaced for $29 last year at Apple store. It has ~ 50 cycles on it. Had been running iOS 9 because I was a firm believer (through experience) that iOS upgrades are a form of planned obsolescence. Have had most of the battery-draining background junk turned off for years now. Great Christmas present from Apple.