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KDDI au (Japan) uses 4 LTE bands and 2 CDMA bands. Find out if your unlocked phone or mobile device will work with KDDI au (Japan). See the tables below for details.

Check device compatibility

Carrier website:
This carrier only accepts approved devices on its network.
Even if a device supports some or all of the required frequencies for this carrier, it will not be able to connect unless the device is approved for this network. Check with the network operator to confirm whether a device is approved or not.

Frequency Bands


Name Interface
B1 (2100) LTE
B11 1500 Lower LTE
B18 (800 Lower) LTE
B41 (TD 2500) LTE

Supported LTE Protocols

Name Generation


Name Interface
BC0 (800) CDMA
BC6 (2 Ghz) CDMA

Supported CDMA Protocols

Name Generation
CDMA2000 1xRTT 3G
CDMA2000 1xEV-DO Rev A 3G