A:Answer you can use the device on your laptop via usb, and you can download the magic jack app to both android and iphone devices (one app download is included with your device) - currently there is no extra fee to use the app on your phone (though it does make use of your cell phone data, carrier fees may apply) they do support vanity numbers for an extra fee, you may call 800 numbers from your magicjack app and device, if you want an 800 number those are only supported with their business accounts which are not compatible with this device - installation is very simple, and there are two ways to do it, you will connect to your computers USB port, wait about 30 seconds to three minutes for the device to update and install and follow the on screen prompts. your other set-up option is to connect the device to your modem or router via Ethernet, the visit www.MJREG.com and follow the prompts to create an account and set up your device. the magicjack device must be set up before you will be able to use the app on your mobile device