In November 2009, Mobistar had announced its intention to acquire KPN Belgium's business segment (formerly known as Versatel), consisting of a 1,800 km glass fibre network, two datacenters, wholesale activities as well as about 9,000 customers. The acquisition concerned KPN Belgium's wholesale activities and the provision of fixed telephony, broadband internet and data communication services to business users.

As the Competition Council voiced some concerns about the effects of the transaction on wholesale competition for broadband access (i.e. the activity of selling broadband access to other telecom operators that do not have their own infrastructure), Mobistar, on its own initiative, proposed to continue to offer KPN Belgium Business' wholesale services on the same terms and conditions as before the transaction, for a period of 18 months. On that basis, the Competition conditionally cleared the transaction on 25 March 2010.

In its decision, the Competition Council stressed that competition on the wholesale markets is key in order to guarantee a diverse telecom services offer to end-users, as telecom operators that do not have their own network should be able to purchase broadband access in order to create their own offer to end-users.