EE needs to reach out to more fixed-line broadband customers, one of its major shareholders has claimed.
Deutsche Telekom - which formed EE with Orange in 2010, when the companies merged their UK operations - said an immediate priority is to increase the number of people taking both mobile and landline/broadband services.
As reported by Bloomberg, Timotheus Hoettges, Chief Executive of Deutsche Telekom, believes customer acquisition must come before any agreement on a new ownership structure for EE.
Plans to float the company - which has a multi-billion pound valuation - were scrapped earlier in 2014, although further discussions have taken place in recent weeks.
Either way, there are no concerns about EE's future prospects; Mr Hoettges said EE is "doing brilliantly".
An initial public offering could still happen, but in his view, the company needs to take care of fixed-mobile convergence first.
Only then will the shareholders be in a position to make long-term ownership decisions, Mr Hoettges suggested.