Which Android phone are you using. All phone cameras use tiny sensors and therein the problem, or part of it, lies. Whilst some are better than others they can't compete with a decent full frame or crop sensor camera. Additionally there's a lot of on the fly image processing/interpolation going on with a mobile to compensate for the inherent inadequacies. The image of the house looks like you've used digital zoom well beyond what the resolution of the sensor will provide adequate image information for. Unlike and optical zoom lens there's no hard stop when it reaches the end of the range, it just zooms in closer on the pixels that make up the image giving a mushy, blocky image. Having said all that for general use most modern mobile phone cameras are capable of taking decent photos. I have taken pictures on a mobile, as that's the only camera I had on me at the time, and the enlarged as a print to 120x25cm. At a regular viewing distance it looks good, get close though and it starts to fall apart. Have enlarged DSLR images the same way and they hold together much better. Admittedly the prints are on canvas which tends to close the gap a little as it effectively reduces the resolving power of the DSLR image. The top one was taken on a Samsung S9, the Owl on a Canon 5D Mk3.
