As per recent News, Nepal Telecom is providing VoLTE(Voice Over Large Long-Term Evolution) over 4G (Fourth Generation of mobile technology) connection. According to NTC (Nepal Telecom), This service ensures HD Audio (High Definition Audio) in 4G compatible devices. Users can activate this service by dialing *444#. NTC does not charge any cost to activating it. But Users can not use 4G speed on the internet during calls. After activating VoLTE service you all need to dial *111# to get FREE 100 MINUTE call pack validating till 28 days.