Yes, but if you spend your whole time out-and-about staring at your cell phone, what have you really accomplished?
If you don't use it much while you're out and about, could you not simply have forgone it, planned your trip 5 minutes before you left home, and checked your email that evening?
I don't spend the whole time on my phone. I don't do social networks and also usually turn off the sound for email notifications as well. But when I do actually need the abilities of the phone, it's there. There's nothing quite like wondering about that bright star on the horizon and then just waving your phone at it and getting the full details. Or getting to know when the next tram/bus home is, before you leave the coffee shop/club. Or grabbing a picture of that rare double rainbow.
I also don't like planning or sticking to plans when going out (how much fun is that anyway?). But I do like to get information on the go, for whatever I decide to do.
If you don't use it much while you're out and about, could you not simply have forgone it, planned your trip 5 minutes before you left home, and checked your email that evening?