Using just Windows Phone 8.0? As far as I know, you can't. However, the Windows 8.1 update with Denim firmware is now available for it. Go to your phone's settings, look up Phone Update, and after a few hours, you should be good to go. At that point, it's a matter of going into settings and selecting Bluetooth. It shout spot the fitbit pretty quickly.
Follow these instructions if you're new to Fitbit:
Open the Fitbit app.
Tap Join Fitbit.
Choose your product.
Tap the set up option.
On the next few screens, enter your personal details. This information is used to calculate your basal metabolic rate (BMR), which determines your calorie count for activities.
Enter your name, email address, and desired password and tap the checkmark at the bottom of the screen.
Follow the onscreen instructions to set up your tracker to your account.
Well -- since I use Startpage, i wasn't sure anyone would know what it is.I thought google was the devil?