Google Maps integration is undoubtedly one of the best
parts of owning an Android device. The service is every bit as reliable as its
desktop counterpart, and offers accurate turn-by-turn directions to boot. But
obtaining all that map data requires a data connection, and sometimes that's a
dicey proposition when you're in an area with spotty coverage -- or when you're
nearing the upper edge of a capped data plan. For those situations, Jelly Bean
lets you download maps ahead of time so you can consult them offline. When
you're on a Wi-Fi network (or in an area with a good data network), click the three
dots in the lower-right of Google Maps and select "Make available
offline." You'll be able to select the area you want to save, and Google
will download the map for you to pore over later at your leisure.