Lumia 950, the last flagship Windows Phone. I've had it for 2.5 years now. Windows is so much lighter to run than Android. The phone only has 3GB of RAM, but still responds lightning fast. The camera is very good, better than the Canon compact that we had. I use it for almost all snapshot moments (got a Sony a6000 for more serious photography), and with Onedrive all the photos get automatically uplodaded to our pc's HDD. It's nice not having to fiddle with usb-cables anymore. There always was an app-gap, and since Windiows phone is now discontinued (I was very sorry to hear that) some apps will probably be dropped soon. For now though Facebook, Whatsapp, Telegram & Instagram are still being updated, and I don't use other apps besides those. My wife has a Lumia 650, and she would like to have Snapchat, if only for the kids' enjoyment. The Edge browser is fine for my phone. And it has the address bar on the bottom for easy thumb access. No idea why Android & IOS don't do that yet.
I consider it a €425 well spent, especially if I can squeeze another year (and a half) out of it. With good camera phones now easily costing north of €800 I will have to start looking into decent cameras on mid-range phones by then I'm afraid. I got my mum a Wileyfox Swift 2x, and my dad a Xiaomi Mi A1. Both cameras appear to make nice pictures in good light.
As a side-note. My dad used my wife's old Huawei before. It can barely last a day on its battery now, so he wanted something else. Instead of throwing it away, we ordered our daughter (of almost 10) a €2,50 subscription (100min/250MB) so she can Whatsapp with some friends. Whaddayasay, too young still?