Picked up a bunch of umbrellas & a folded exercise machine. When dropped off my cell phone must have dropped out of my back pocket and into the back seat. The metered fare was $5.30, and I paid $7 cash. I did not take a receipt. The driver was kind enough to help me with the items, by placing them on the sidewalk. The time was approx 12:45 to 1:00 am. After the cab left, I realized my phone was gone. Upon getting home, I used my “Where’s My Droid” app and located my phone in the taxi , as it zigzagged through Brooklyn, picking & dropping off passengers.I guessed that the phone was under the seat because it was still there at the last stop, which I think was his home, at about 2am at 3903 ave I, and stayed there until around 430 am when i finally went to bed. The next day, the signal was lost.