Cellphone vs. Camera Test at Martial Cottle Park, 11/10/17 by Ronald Horii
I took 5 cameras with me to Martial Cottle Park to do a comparison between the. 3 of them were actually cellphone cameras. These are the cameras:
Samsung Intensity II (old basic phone), 1280X960 pixels (1.2 megapixels).
iPhone 4 (old smartphone), 2592X1936 pixels (5 megapixels), 4.54X3.39mm sensor (1/3.2")
Moto E4 (new smartphone), 3264X2448 pixels (8 megapixels)
Panasonic ZS50 30X travelzoom, 4000X3000 pixels (12 megapixels), 6.17X4.55mm sensor (1/2.3")
Olympus OMD E-M10 Micro Four Thirds (MFT) mirrorless with 14-42 mm lens, 4608X3456 pixels (16 megapixels), 17.3X13.0 mm sensor
This talks about the MFT sensor and compares it to other sensors: https://en.wikipedia.org/wiki/Micro_Four_Thirds_system

I took pictures under various lighting conditions. I took multiple pictures with different exposures. I used auto-exposure, but locked the exposure at different parts of the scenes. All pictures were handheld. Where supported, I used the built-in HDR (high-dynamic range) capabilities of the cameras. (In HDR mode, the cameras take multiple shots at different exposures and combine them into one shot.) I then picked the best shots and put them below.

The bottom line is that the smartphones take decent pictures in good light, but the larger sensors of the compact and mirrorless are better in low light. The new E4 takes much better pictures than my old iPhone4, but it has a fixed lens, so it only has digital zoom, which not very good.

The pictures were uploaded to Facebook unedited, but Facebook resizes the larger pictures to a maximum width of 2048 pixels.