OnMobile has helped Vodafone Spain leverage Ringback Tones to increase the awareness and adoption rate of Voice over LTE (VoLTE). Committed towards providing improved quality in both voice and calling experience, OnMobile has encoded High-Definition Ringback Tones in AMR – WB (Adaptive Multi Rate - Wide Band) format. The OnMobile solution enables Vodafone's Voice over LTE (VoLTE) service users to experience high audio quality, thereby improving consumer experience and stickiness.