I forgot about daphnia. Those could work too, if not better, but I will have to get hold of a microscope.
I did some research, and I found that Ionizing radiation (as opposed to nonionizing) ionizes atoms and breaks chemical bonds. UV and up is considered Ionizing. Cell phones emit radio waves to send and receive signals. The chart displayed says that UV radiation/ionizing radiation begins around 10^16 Hz. This is saying that the radio waves that are emitted by cell phones aren't ionizing.
They can cause heat related reactions though, take microwave radiation for an example. The article also says that studies continue to contradict each other, but not about radiation being absorbed into cells, but about how much radiation is considered harmful and over what period of time. This is especially debated because of the seemingly harmless nonionizing radiation emitted by cell phones. The long term
effects are the ones in question, so that makes me doubt the viability of my project showing much evidence in even a month or two, especially when the FCC places limits on the amount of radiation emitted by the devices. The specific absorption rate limit in the US is 1.6 watts per Kilo.
It does make me wonder if something larger, a tablet, computer or even a TV would work better.
I found this link to test the SAR of devices by the FCC: http://transition.fcc.gov/oet/ea/fccid/
The only thing that it would identify was contained in a Wii at 2412.0 to 2462.0 Mhz