The HSS (Home Subscriber Server) is the concatenation of the HLR (Home Location Register) and the AuC (Authentication Center) â two functions being already present in pre-IMS 2G/GSM and 3G/UMTS networks.
Three Days Grace's music has been described as post-grunge, hard rock, alternative rock, alternative metal and nu metal. Their self-titled album mostly uses the sounds of alternative metal and post-grunge. However, on their second album One-X, the band had more guitar solos and a more melodic sound.
Three Days Grace formed in 1997 according to an interview with Adam Gontier. They met up in the 9th grade and moved to Toronto where the 'music scene' was big. They've been a â¦band for 14 years now if you count from the very beginning of their formation.