In the event that you are registering an account but either enter the wrong number or do not receive the OTP despite entering the correct number, please refer to the following link: "I am not receiving a verification code via text message." If you still do not receive it, please contact our customer service staff via email at support@gigabank.jp to receive timely assistance.
In the case that you have registered an account with GIG-A and need to update your phone number, please contact our customer support department via email at support@gigabank.jp or through the Chat with Us feature to receive support in the app, along with the following information:
Old phone number:
New phone number:
Reason for changing the phone number
Afterward, the customer service staff will assist you in updating to the new phone number.