If your mobile phone does not come with a flash, the new Phlash universal cameraphone flash might just be what you are looking for. It measures just over an inch wide and can either be stuck on the back of your phone or just hung from the phone using the included strap. It’s built around a light-emitting LED array and is powered by a coin-type lithium-ion battery. It promises full-frame lighting that is both even and color-balanced and is designed for close-up pictures (up to 1 meter away for optimal performance).
You will need to practice your photoshooting skills a bit as the Phlash is manually synchronized. Basically, when you take your picture, you must also click on the Phlash button to trigger the flash at the same time.
The Plash can be yours for $29.99 USD.