You can order the fob by tapping on Devices and selecting the Devices sub tab (top right) and then selecting Order fob.
The fob costs 9.99 GBP.
If you haven't verified your documents yet, you will be asked to do so now.
Once the verification is complete, you will be able to return to Devices and request the fob.
It generally takes 1-2 (UK) or 3-5 (EU) business days to arrive.
Once you receive your fob, please go to the Devices section and Devices subtab of the MuchBetter app, swipe right enter the 9 digit code into the field and tap Activate Fob.