I am still trying to justify the expense of a smartphone. But for the 2nd time it came in very handy. We were on a day trip and on our way back when my husband and I both noticed that we did not remember going over a bridge we went over. He siad well, take out that smartphone of yours and find out where we are. So I spoke into the Navigation app and told it where we wanted to go and it gave us turn by turn directions how to get back to where we took the wrong turn. I did not know we had "voice turn by turn" on the Eris. But now I do it worked great. I guess that came with the 2.1 upgrade. I did have to plug it in because my battery was almost in need of a charge but luckily I brought the charger cord.