I too recommend tinkering with the photo and camera settings. Try auto-focusing the camera before taking pictures, as well. Sometimes the odd photo will come out bad here and there, with any phone you get. I'm sure there are tips and tricks on YouTube, as well!
So everytime you go to take a picture tap the screen where you want the main focus point to be? I see people around me do that a lot but I just thought there wasn't much to it.
I'm still annoyed by how bad my low light pictures look. Earlier this month I went to a small concert where I was no more than 20 feet away from the performer and in my screen it looked like she was 20 miles away. I took a shot of the stage before the concert started and everything looks sort of ok but the three shots I took of the performer after that look terrible. But the two people right beside me, one had a Samsung and one had an Apple phone, in their screens it looked like you were watching the concert on tv, it was that clear. All of the lighting was correct, they had a close up shot of the singer. I'm looking over at their phones thinking "how in the heck are they doing that?"
Now we were told before the show since we were in the first few rows to not hold our phones up because it would distract the band so we kind of had to do a hip shot and I had my screen dimmed pretty good. But I don't know why I keep struggling with low light pictures. I just knew being so close to the subject these should be pretty good and they look awful.