iPhone 4. Not totally sure why other than I'm still on a family plan with my mom and sister and the upgrade was free when the 5 dropped. Before then I had a slide phone with keyboard, and I still kind of miss that. But it is nice to be able to get on the internet whenever something internet-y comes up even if I don't have more than a couple non-Apple apps. It also functions as my iPod which is pretty important I suppose; I remember a time when having a 300GB iPod or whatever seemed like barely enough and now I'm totally fine with 16.
Just upgraded to a Lumia 625 a couple of weeks ago. It's not too fancy compared to other phones on the market but it's a massive jump from the HTC Legend I was using. I'm still getting used to the Windows platform though. It's really very nice, but to be honest I still kinda miss Android, it was great to use and there were a bunch of cool and useful features that I miss.
The lack of a solid free app for podcasts is annoying me at the moment. The one I had on my previous phone was great and I was able to get premium podcasts through it too. Can't do that on this Nokia and I can't just download them through the browser either. Might have to pay for one but I really need to make sure it supports premium podcasts first though.
Using a Nokia Lumia 920 upgraded from a Samsung Omnia 7. Stuck with Windows Phone because I like the experience but despite gaining traction, the app situation is still pretty dire. It also doesn't help that certain features from WP7 are severely gimped in WP8.
Currently phoneless. Used to have an old Nokia somethin'-somethin' handed down to me by my mother when she got some fancy-schmancy Samsung somethin'-somethin'.
Eventually wound up throwing it out because I never really had need for it. Don't really call anyone and noone needs to call me.
Though I've been pondering getting an iPhone. Not necessarily whatevers newest, but I've seen some pre-owned ones for relatively cheap and the main reason it appeals to me is that I could sync all my stuff from my iPod touch to it and just carry around the phone instead. Just a bit of added functionality and more storage than my 8gb ipod touch has. Will continue pondering it and will likely continue to not actually go through with it because at the end of the day, I still don't really need the phone.
Currently I own an iPhone 5S as my personal phone and I really like it; I've pretty much stuck to iOS ever since I got an iPhone 3G for $99 on contract coming from my Motorola Razr, though I have had short stints with a Galaxy S3 and Galaxy Note 2.
We have a duty phone that I have to carry around as well when I'm working, but it's an older, crappy Motorola phone that's running a pretty old version of Android and is not representative of the current Android ecosystem in the slightest.