Samsung voiced annoyance Thursday after South Korean telecoms operators released its latest smartphone ahead of schedule in order to dodge sales restrictions imposed by regulators. The worlds biggest mobile phone maker had planned to release the Galaxy S5 — first unveiled in February — globally on April 11. But the Souths top operator SK Telecom, along with smaller rivals KT and LG Uplus, started selling the phone on Thursday. SK Telecoms business suspension begins April 5 — before Samsungs planned Galaxy S5 launch date — and continues until May 19.