[gogglev]

Pretty much all recent phone cameras have pretty excellent image quality. A big factor when people often talk about poor image quality isn't so much the camera, but the lighting. Also don't zoom in with a phone camera, it's just digitally cropping while making it a lot harder to stabilize. Just crop the photo afterwards. A common cause of blurry images is just having the camera too close to the subject. Even if your camera has a macro mode, there is a minimal focal distance for all lense, which is why Macro lenses are a thing. It's always better to move back a bit and crop than be too close and out of focus.

Lighting is probably the easiest thing to fix. If you don't want to build a simple light box, just grab two lamps, place them left and right of your subject and cover it with some white paper or cloth to diffuse it. Oh try to avoid firing a flash directly on the subject, its going to blow out the details and give it really harsh lighting. If you do fire the flash directly, try to place a piece of wax paper over the flash to diffuse it as much as possible. But seriously, lighting is crucial.