TeliaSonera’s Spanish subsidiary Yoigo, the fourth largest challenger in the Spanish mobile market reached four million subscribers last week.

Yoigo was launched in December 2006 and became cash flow positive in 2012. At year end 2013 the company reached 3.9 million subscribers, a five per cent increase on year end 2012 and in a challenging economic climate also surpassed the billion euro sales mark.

The carrier became the first to launch LTE in July last year, capitalising on TeliaSonera’s expertise as the first operator to launch 4G services in Sweden and Norway in 2009.

By the end of 2014, 75 per cent of the Spanish population is expected to be able to use LTE technology, TeliaSonera said.