Airtel has expanded its voice over LTE (VoLTE) services to Karnataka. Airtel VoLTE is already available in Andhra Pradesh, Telangana, Mumbai, Maharashtra, Goa, Gujarat, Madhya Pradesh and Chhattisgarh. Meanwhile, Airtel has expressed interest in buying select spectrum assets and equipment of RCOM in the 850 MHz band. The spectrum is considered highly efficient for providing 4G services and will enhance Airtel’s 4G play in India.