This explains the items you need to check when the SMS (short message) for account registration is not received.
If you check each item and the issue is not resolved, you may not be able to use our service.
We sincerely apologize for this inconvenience.

■ Items to Check
■ Items to Try
■ How to Change Settings for Major Carriers Regarding International SMS
■ When Using MNP (Mobile Number Portability)

■ Items to CheckVerify that the information is entered correctly

• Is Airplane mode turned off?
• Are you in a location with poor signal reception?
• Have you set up to reject receiving SMS (short messages)?
• If you are using Rakuten network, is SMS being received within the "Rakuten Link" app?
• Have you requested the login code for the same phone number more than a certain number of times in a short period? 

If you request a login code for the same phone number more than a certain number of times in a short period, authentication will be locked for security reasons. Please try again after waiting about a day.
For details regarding SMS reception settings on your device, please contact your carrier.

■ Items to Try

• Restart the app
• Restart your smartphone
• Update the LUUP app to the latest version

■ Changing Settings for Major Carriers Regarding International SMS

We use international SMS for authentication.
If you have set to reject international SMS, please make the following changes.

• If you are using au:Click here
• If you are using NTT docomo:Click here
• If you are using SoftBank:Click here

* If you are using a carrier other than the three mentioned above, please contact the relevant carrier for settings to enable international SMS reception.

■ When Using MNP (Mobile Number Portability)

If the carrier has changed due to MNP, you may not be able to send or receive international SMS for a few days.
There are cases where retrying after some time resolves the issue, so please try again.