To enable AirDrop on your iPhone or iPad you have two different options:
How To Enable iOS 7 AirDrop For Contacts Only
Step 1: First turn on your Control Center by sliding up from the bottom of any Home Screen on your iPhone or iPad.
Step 2: Now tap over AirDrop.
Step 3: Then Choose the Contacts Only option.
How To Enable iOS 7 AirDrop For AirDrop Users
Step 1: First turn on your Control Center by sliding up from the bottom of any Home Screen on your iPhone or iPad.
Step 2: Now tap over AirDrop.
Step 3: Then Choose the Everyone option.
That's all you have to do for enabling your AirDrop for any iPhone and iPad. AirDrop is built in feature in iOS 7. You don't need to download it. It is much faster and secure for any file transfer which gives you full option for whom you would like to send and receive files.it's typically a much faster way to transfer files than the cellular network, which makes it a great option for times when you have no WiFi or crappy cell service.
If you are facing any trouble while enabling it let us know.