Realize that this is not an official guide, just one built from my quick and short experience.
There may be other features I don't know about yet.
For instance, I know that certain non-Apple apps can also use AirDrop, but not all of them, and there may be other file types that can use it that I did not try.
Based on what I found with experimentation, here is a step-by-step guide on using AirDrop:
AirDrop works only on iPhones, and allows you to send and receive contacts, photos, and videos videos between iToys using Bluetooth. You must have AirDrop enabled before you can use it. This is done by swiping up from the bottom of the screen, then tapping on AirDrop. You must then select with whom you want to share files via AirDrop. Your options are Off (nobody), Contacts Only, or Everyone. Everyone means that any iToy can send you files via AirDrop.
Sending AirDrop Files
Next, you must select the contact, photo, or video you want to send. You can only send one contact at a time, but with the Photos app, you can select multiple photos or videos to send at one time. After selecting the files to send, tap on the Share icon which is a box with an arrow going up from the middle and out of the box. This will give you your sharing options. These could include several things including different apps that handle the same kind of files, but at the top of the list will be the AirDrop section. Tap on the AirDrop section and you will be presented with a list of any iToy users who are close enough to be detected by your device, and who have Bluetooth enabled, and have AirDrop enabled. Remember, Bluetooth is only good for about 30 feet line of sight. Tap on the person you want to send to and you're done.
Receiving AirDrop Files
If you already have AirDrop enabled and someone has sent you a file, you may have three options for saving it, depending on the file type. For photos and videos, tap the Accept button and it will save the file into the Camera Roll. For contacts, you actually have three options. They are:
1 Click the save button in the top right corner of the window. This will save the contact in your Contacts app. If you are using groups, the contact will be saved in the All Contacts group, meaning it has no group association.
2 Click on the Create New Contact link near the middle of the window. This allows you to edit the contact record before saving it.
3 Click on the Add to Existing Contact link near the middle of the window. This allows you to integrate the received contact info with an existing contact. This is great for adding missing information to an already established record.
No matter how you save them, all AirDropped contacts come with almost all fields except intact the Notes field. Any group associations with an AirDropped contact are also lost, so it you want to move received contacts into groups, you will have to do that manually. However, if you use option 2 above, you can enter the Notes info before saving the record.
David Gunther and John Gassman