I've lost my Z10 for a week now, and I missed it so much. The most is definitely GPS/ BlackBerry Maps, because even for a daily route, I also frequently have google tell me exact times and routes for transit than remember it or figure it out. I have to turn on GPS often and battery drains fast so I also missed my beast mpj 5000mah extended battery. I also tend to not know where streets are in relation to each other so just Map everything. Other than those, killing time with ebooks, and occasionally texting or calling people.
I am about to order a replacement. Wondering if you lost your BB phone, what you may miss most?