Maximizing Potential

One thing with using a small camera on a Android phone, and a short focal length of around 2mm or 4mm, you end up with a massive depth of field that you can't really do much with.  If you could adjust the aperture wider than ƒ/2.7 at least you'd be able to work with more.. But of course, that's it.. max and minimum aperture for the camera is ƒ/2.7 so you don't have much to work with.
But at least you have a little bit of exposure control, such as the metering, through SPOT, or Matrixing, or even center-weighted averaging.  Can go +2 or -2 for exposure, and even change the ISO settings from 100 through to 800ASA.  Personally, I wouldn't dare shoot at anything beyond 200 on this phone.  Noise factory city beyond 200!  I mean, the sensor is the size of a 110 perforation!

So you have some work cut out for yourself in post.  That's not exactly a bad thing, if you don't mind trying different things.

One thing that I find essential is more contrast in B&W images, as the tonal ranges suck.  At least if captured solely in B&W on the camera.  It is terribly flat!
Nice and sharp, absolutely, but a complete lack of tonal range, which is unfortunately.  Everything is a light gray colour.  Terribly flat image, but it's easy to add contrast than to take it away.  Plus there really isn't much in the way of a dynamic range on such a small digital sensor.

Nonetheless I persevere and use the camera whenever I can.  Something to help soothe the beast, after all.

So without further adieu, here are some images with a little bit of processing to increase the effect and punch of a Camera Phone.

Petzval Effect

Spot Focus Rails

Perspective

Shifted

So a bit of post-work and a few images taken on a camera phone can look like something taken with a much higher end camera.

My favorite that I have taken with this camera so far is the Petzval Bridge.
Added a change in the focus, plus some Radial Blur in CS6, and you get a Petzval effect with strong swirling.

Until next time, keep those shutters firing!