Telenor is giving its clients until the end of June to refuse tariff changes that will take effect on July 1, while Magyar Telekom will inform its subscribers of tariff changes in July and give them a chance to reject them for 15 days, the telcos said. Hungary’s National Media and Infocommunications Authority (NMHH) on Friday said it signed contracts with Magyar Telekom and Telenor “ensuring the validation of subscriber rights” when tariff changes take effect on July 1.