To use cellular data you will need to enable data and check the Access Point Name (APN) is correct.
IMPORTANT: For unlimited data you must ensure that your device is set to use the correct APN. Use of any other APN may result in data being charged at up to ¥3 per kiloByte (¥3,072 per MegaByte).
Enable Cellular Data
Tap “Apps” (circle with six dots) > Tap “Settings > Tap “Data usage” > If necessary, tap the switch to toggle “Cellular data” to Enabled:
Check the APN Profile
Tap “Apps” and “Settings” (as above) > Tap “More” > Tap “Mobile/Cellular networks” > Tap “Access Point Names”
You will then see the APN profiles saved in the phone. The active profile is identified by a dot within the circle. The first line of the profile is the name, the second line is the actual APN:
Creating an APN Profile
Should you not have a profile with the correct APN you will need to tap add “+” to create a new profile.
You will then need to complete the Name, APN, Username, Password, MCC, MNC and APN Type fields using the settings below. All other fields can be left blank or as their default content!
Once the settings have been entered, tap options (three vertical dots) and then tap Save.
You will then be returned to the APN profile screen, tap the circle next to the new profile so it is active.