The Nigerian Communications Commission (NCC) says using second hand and substandard mobile phones pose greater risk to the users, urging Nigerians to desist from the use of such devices, Leadershipng reports.Executive Vice Chairman of the Commission, Professor Umaru Garba Danbatta gave the advise at the occasion marking NCC special day at the ongoing 37th Kaduna International Trade Fair.Professor Dambatta who was represented by Hajia Maryam Bayi debunked insinuation that telecom facilities like masts and towers pose health hazards to residents around such facilities, saying cell phones, pose greater health risks than masts.While highlighting the numerous roles of NCC towards ensuring that telecom subscribers get the best of service from their service providers, the telecoms regulatory agency said, consumers must also play their roles accordingly in other to receive quality service.According to him, “the use of substandard and counterfeit devices, have been identified as one of the reasons for poor quality of service.“Today, there are different types of handset in the market. Some of these devices have been used and dropped in the other parts of the world. Some are devices that did not meet international benchmarks for safety and other requirements,” he said