Full auto. Dark aquarium attraction. No flash allowed and not used. I'm really impressed with the camera in low light. I know nothing about photography. Looks better to me than I would have gotten with any other phone camera I've used. Which is basically all of them
Had my G3 for three days now bought from a Florida AT&T store (there were only two left). First day I was surprised to find they gave me a 32GB version. Second day played movie Premium Rush at full brightness for an hour and found it was only barely warm with no overheating messages. Third day with moderate use from 6:AM to 9M I had 70% battery left. I am well pleased I do not have to deal with miss hitting side buttons and unsightly side SD card ports; this is a really elegant looking device and the knock on/off lets me ignore the back on/off button. I'm not a nit picker when it comes to camera quality since I have a Canon DSLR. Call quality is great and volume is definitely louder than my old Samsung GS3. All in all I would definitely buy this phone again.
The low light pics aren't great with the G3 but they are better than the low light pics with a S5. This is one of the reasons I am going with the G3 over the S5 as it seems a lot of my shots are taken in low light (bars, lol).