HTC held an AMAA (Ask Me Almost Anything) on Reddit earlier today/night (depending where you are).
The update started to recently roll-out here in Europe, and will reach most unlocked devices inside a few weeks or so. Version number on my update is 2.18.401.2
Using an app from NXP (they make NFC chips), NFC TagWriter by NXP. This app does most of what you need when it comes to NFC. There’s another one called NFC Tasker that works a bit differently, but that will get it’s own post later on.
As always: make sure that NFC is ON before you start. The app itself is pretty simple to use.
Going to do this by comparing it to my old One X, and then focus just on One X+.
Will limit myself a bit and only cover One X, One X+ and 8X now. Two androids and one wp8. And yes, you can do nfc/beam between such different phones like One X+ and 8X.