You won’t need to switch phones to get improved HDR photos.
Developer B-S-G has modified the Google Camera app to enable HDR+ on any Android phone with a Snapdragon 820, 821 or 835 processor.
This could lead to improvements when taking photos in situations with bright highlights or dark shadows. If your phone’s default image processing is mediocre.
The software is still in a rough state, so you might not want to install it if you depend on Google Camera for your snapshots. We lso wouldn’t be surprised if the mod is relatively short-lived given that it’s not exactly Google-approved.