Best Android phone for app development / programming?

[Cromulent]

I was a bit unsure whether I should post this here or in the programming forum but I guess the mobile phone section will have people who know much more about Android phones in general so I posted it here.

I'm looking for a new Android phone to develop a small Android app on and I was wondering what people would recommend for the job?

My requirements are pretty simple:

* Must be as fast as possible
* Must run the latest version of Android (8.1 I believe?)
* Must have very accurate GPS / location tracking
* Must be able to take photos and video with both the front and the rear camera
* Bigger screen is better for my purposes

If possible I'd like a phone that can be upgraded using unofficial builds of Android once it is no longer supported by the device manufacturer as that should increase the life of the device.

Edit: Seems I can get a Samsung S8 for £23 a month. Does that sound like a good deal?

 

[Cromulent]

Awesome. Thank you all. The Pixel 2 it is then.

 

[Cromulent]

I've got a Nexus 4 running Android 5.1.1 at the moment. That should be good enough to use as an old phone but having said that I really want to be able to incorporate some of the features of the latest version of Android into my app.

If I remember correctly though you can require a lower version of Android and then do checks in your code to see if you are running on a newer version and if so you can enable the newer features. I'll have to do some reading into that particular issue.