PT XL Axiata Tbk is an Indonesia-based mobile telecommunications services operator headquartered at Jakarta. It is the second largest mobile telecommunications company in Indonesia. The operator's coverage includes Java, Bali, and Lombok as well as the principal cities in and around Sumatra, Kalimantan and Sulawesi. XL offers data communication, broadband Internet, mobile communication and 3G services over GSM 900 and GSM 1800 networks.