The combined entity would also be required to cap certain mobile tariffs and "offer preset contractual terms" to so-called mobile virtual network operators (MVNOs) — mobile operators that piggyback off of another company's network.
Vodafone and CK Hutchison, the owner of the Three U.K. network, announced the transaction last year. The deal, now approved, will merge the two brands' U.K. businesses, giving Vodafone a 51% controlling stake and leaving CK Hutchison with the minority interest.