The new Nokia Here Maps have an option that enables you to download maps to your iPhone or iPad via Wi-Fi, so there won't be any data connection needed the next time you will be using the app.
If you dont't want that every time you take a picture with your Android device, it gets instantly uploaded to your Google+ profile, this tutorial's for you.
Airplane mode on a phone is when you disable all the active connections like WiFi, bluetooth and mobile network. Let's see how to enable it so you don't need to turn off your phone on an airplane.