Deutsche Telekom, Europe's largest telecoms group, has promised to revamp its mobile-phone subsidiary in the UK and take a "long-term" view in spite of pressure to sell the flagging unit.

René Obermann, D Telekom chief executive, said yesterday he believed in T-Mobile UK's "chances in the medium to long term" because a network-sharing deal with 3 UK allowed it to market the unit "more aggressively".