Terms:
3.7. Equipment We will supply the Vodafone Home Broadband and Phone equipment to you. You can use your own router to receive the Vodafone Home Broadband and Phone Services but you must: (i) ensure it is compatible; and (ii) use your Vodafone router in order to display speed information on the Vodafone Broadband app. If you are a Vodafone Fibre to the Home Broadband customer (previously known as Vodafone Gigafast Broadband): (a) speed information will not be available on the Vodafone Broadband app; and (b) you will need to use the Vodafone router in order to use the phone services. You must not connect equipment to our network that may harm it, or anyone else's equipment or services. If the Vodafone Home Broadband and Phone Services are terminated (by you or us) prior to activation or during the "cooling off period" (see 7.3(a) below) or due to any unavailability issue, you must return all equipment which you have received under your Agreement. Failure to return any equipment when requested to do so may result in charges in line with our Returns Policy.
Return Policy:
https://www.vodafone.co.uk/terms-and-conditions/consumer/buying-with-vodafone/buying-online/returns-...
so, unless you cancel within the 14 day cooling off period, one does not need to return the router.
