iOS - Unpair Pebble and iPhone
Unpair Devices

To unpair devices, follow this path on your Pebble:
Main menu -> Settings -> Bluetooth -> [Device’s name] -> Forget.
To unpair Pebbles on your iOS device, go to Settings -> Bluetooth -> tap the icon to the right of your listed Pebble -> Forget this Device.
Repeat same process for the Pebble-LE XXXX pairing.
To make sure that your previous connection has been fully severed, please restart each device. To reboot Pebble, please press and hold the Back, Up, and Select buttons (simultaneously) for 10-seconds.
Once you have successfully unpaired and restarted each involved device, please try your pairing again.