Re: "quickly offer its customers new, personalised products"
If experience is anything to go by, you will find unexplained charges in your monthly bills for things you have never agreed to, heard of, seen or used but apparently have in the contract you haven't signed.
If a sales drone/customer support from Vodafone ever calls you never use the word yes in the conversation at all as it will be used as permission to go ahead and supply you with some rubbish that you don't want.