The incessant touching of your phone can harbor germs on your handset. The greasy, oily residue you may see on your cellphone after a day's use can contain more disease-prone germs than those found on a toilet seat. In a study conducted at the London School of Hygiene & Tropical Medicine and Queen Mary, University of London, researchers sampled 390 cell phones and hands to measure for levels of bacteria. The results of the study showed that 92 percent of the cell phones sampled had bacteria on them — 82 percent of hands had bacteria — and 16 percent of cell phones and hands had E. Coli. Fecal matter can easily be transferred by cell phones from one person to another