Japan’s Rakuten Mobile said it restored its service on Rakuten UN-LIMIT VII plans, after a system failure caused difficulties making calls and sending data for over two hours.

The mobile carrier, a subsidiary of Rakuten Group, did not say how many users were affected by the issue, which lasted about 2-1/2 hours after starting shortly before 11:00 a.m. local time.

Rakuten Mobile said in a statement that service was restored at around 1:26 p.m. on Sunday (0426 GMT Sunday).

Japan’s internal affairs ministry in August issued rare administrative guidance to rival wireless carrier KDDI after tens of millions of users were affected by network troubles in early July.