After more than three days of network disruption that impacted up to 39 million mobile lines, KDDI said Tuesday evening that its services had been fully restored — news that users had been anxiously waiting for.

KDDI, Japan’s second-largest mobile phone carrier by number of subscribers, said the firm confirmed that the network returned to normal at 3:36 p.m. on Tuesday.

If users are still experiencing difficulties connecting to the internet or making voice calls, restarting the phone should solve the issue, KDDI said.