Those who use the "au" mobile phone service operated by KDDI will be able to utilize the service for free, while those who use other providers can access Wi-Fi for two hours by paying 300 yen ($2) or 24 hours for 600 yen. According to KDDI, there are many mountainous areas where mobile communication is difficult or fibre optical communications are not available, forcing hikers to leave their lodges and descend in search of places where there is a mobile phone signal. "We will provide (Wi-Fi) to a wide range of people, not limited to our customers, so they can enjoy mountaineering safely," a KDDI official said.