So my Nexus 5 is starting to near the end of it’s life and I need a new phone sooner rather than later. I want a top-end phone with top-end specs, a screen that’s 5.5 inches or less (no exceptions). It must also be compatible with or sold by AT&T, but have decent ROM support. I’m not using an OEM’s UI under any circumstances so a decent development community for the phone is a must. It also must have been released in 2015. Thanks in advance to anyone who can offer any help.