Hi guys.
If you want to receive calls and texts notifications from your iOS device, I recommend checking if your phone is a compatible mobile device. If it is, then you just need to do the following:
STEP 1: SETTING UP NOTIFICATIONS ON YOUR TRACKER
Two trackers have a setting for notifications.
- If you have a Surge, swipe to Settings and make sure Notifications is set to On.
- If you have a Blaze, hold the top right button for a couple seconds to make sure Notifications is set to On.
STEP 2: SETTING UP NOTIFICATIONS ON YOUR MOBILE DEVICE
- Confirm that your mobile device is compatible with our notifications feature by visiting http://www.fitbit.com/devices.
- Make sure Bluetooth is enabled by going to Settings > Bluetooth.
- Make sure your mobile device permits notifications:
- Go to Settings > Notifications > Phone.
- Make sure Allow Notifications is on.
- Repeat steps 1 and 2 to enable notifications for text messages, calendar events, email, and other third-party apps such as Facebook or WhatsApp.
- (Blaze only) If you're enabling notifications for third-party apps, be sure the following settings are turned on for each app:
- Make sure Allow Notifications is on.
- Make sure Show in Notification Center is on.
- Make sure Show on Lock Screen is on.
- Under Alert Style When Unlocked, select Banners or Alert.
- Go to Settings > Do Not Disturb and make sure these settings are turned off because they prevent the mobile device from sending notifications to your tracker.
STEP 3: SETTING UP NOTIFICATIONS IN THE FITBIT APP
- Make sure your tracker’s firmware is up-to-date and that you have the latest version of the Fitbit app.
- Open the Fitbit app and tap Account > your tracker's name > Notifications.
- If you’ve never received notifications on your tracker, follow the onscreen instructions to connect ("bond") your mobile device with your tracker. To verify that set up was successful, look at the list of Bluetooth-connected devices on your mobile device. Your tracker's name should appear.
- Under Notifications, turn on the types of notifications you want to receive on your tracker (calls, texts, and calendar events). Keep in mind your tracker will show calendar events sent from your calendar app to your mobile device. If your calendar app doesn't send notifications to your mobile device, you won't receive notifications on your tracker.
- If you have a Blaze, tap App Notifications and then select the apps that will send notifications to your tracker. If an app is missing, try syncing your tracker first and then checking again.
Happy stepping! 
Alejandra | Community Moderator, FitbitIf you like something I recommended, I encourage you to mark that reply as "Best Answer". 🙂