Telco T-Mobile lost 588,000 customers in the Netherlands over the past year, according to figures published by parent company Deutsche Telecom on Thursday.

T-Mobile currently has some 3.7 million clients in the Netherlands, compared with 4.3 million a year ago. Of those, 2.75 million people have a permanent contract and almost one million people a prepaid phone.

According to RTL news, it is unclear why T-Mobile has lost so many customers but the fact its 4G network is not nationwide could be one reason.

KPN, the former Dutch state-owned phone company, has boosted its market share over the same period, ANP says.