(Telecompaper) TeliaSonera has signed up Deutsche Bank to prepare the sale of its 77 percent stake in Spanish mobile unit Yoigo, according to unnamed sources cited by business daily Expansion. The report adds that TeliaSonera expects to receive bids of around EUR 600 million in the coming weeks, with rival operator Masmovil Ibercom and Zegona, the investment vehicle that last year acquired regional broadband operator Telecable, said to be most interested in Spain's number four operator. After nine years of activity in Spain, Yoigo still boasts over 3.4 million customers but its relatively low market share of just over 6 percent remains a concern to the Swedish parent company.