I'm sorry I don't know about your iPhone that's not what I hear about the a zillion of iPhone users around me. Ipad mini 4 I have is quite possibly the most stable electronics I had. And that's the only iOS device I ever owned. Not a fan of apple at all actually. But you have to give the give back to Caesar what is Caesar's.
That being said, it is not free of bugs! it is nowhere near the fastest! it's not super responsive every single moment! It still has wifi issues! But reliability is of the charts. It's not a bmw that's a monster on the road but you have to take it to the dealer multiple times a year. It's more like a seasoned audi that never let's you down. If there's a bug you close the app, not do a soft reset. if it's slow you close the apps. If it's not responsive enough you close a couple of apps. If the wifi is spotty, you just disconnect and reconnect. Not do a soft reset.
We, as a community (I guess I'm not alone), are upset about 950 and windows mobile 10 in general, because it has much more potential than any other platform. But it is not getting there. It doesn't look like it will get there. User interface is really intuitive. But every update there's something 'broken.' I mean seriously there's a thread that's titled: what's fixed and what's broken, after every update.