Cameraphone, meh.
I've got an N4. I don't use the camera on this as it's crap.
Mostly these days I use my Nikon D3200 DSLR but lurking in the same camera bag is my Agfa Isolette 3, a Leningrad light meter and a few rolls of Ilford FP4 Plus 50 ISO (aka film!) on120 plus a few simple chemicals can make for staggering B&W prints, medium format greyscale with resolutions in gigapixels... you can shoot in available light, no flash with this stuff :)
http://www.ilfordphoto.com/home.asp
Ilford B&W film (FP4 or HP5) is cheap enough, it's quite tolerant of poor light, developing it is straightforward, perhaps the commentards on here should try it using a pinhole camera made from a shoebox or get a no-name 120 viewfinder or twin lens reflex camera from a junk shop. You'll be surprised with the results.