KDDI's network has almost been "restored nationwide" after more than two days of disruption, which affected up to 39 million mobile lines in one of the worst outages ever, the carrier said Monday, with the problem having impacted not only users but also organizations in areas ranging from banking and logistics to emergency services.

An official of KDDI, which runs the au mobile carrier brand, said during a Monday evening news conference that the network was basically stable, but the firm will keep monitoring it and will likely announce the full recovery on Tuesday evening.

“It’s the biggest glitch in our history,” KDDI chief Makoto Takahashi told reporters Sunday.