Since "Data ONLY SIM card" and "Voice + Data SIM card" are two different products, it is not possible to simply switch between these plans. The same applies to Data Only SIM cards - Pocket WiFi, etc... It is only possible to change the monthly package of the same product (5 GB to 25 GB or 25 GB to 5 GB).

1. To change your plan from "Data ONLY SIM card" to "Voice + Data SIM card", please cancel the current contract (Data Only) by submitting a termination form by the 25th of the month, then apply for a new contract (Voice+Data). The new contract will start immediately and another registration fee will be charged. 

The discount for the registration fee is 5,500 JPY => 110 JPY (you will need to use the same email address when you sign up for the new plan). The discount is a special arrangement so if you would like to change your plan from "Data ONLY SIM card" to "Voice + Data SIM card", please kindly contact us.

If your payment method is Smart Pit (cash payment at the convenience store), please note that a deposit of 20,000 JPY will be required for the "Voice + Data SIM card" Plan if you would like to continue to use the Smart Pit payment for the new contract. This is different from the registration fee.

The image below is a simple visualization of the process that you need to go through.

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2. To terminate your contract, please log in to your Sakura Mobile My Page and submit a termination form by the 25th of the month※. You can read the following article for more instructions on canceling your plan.

※ If you submit the termination form after the 25th of the month, the plan will be terminated one month later.

※ The last bill for the old SIM card plan (Data Only) will be charged one month after you terminate the contract. 

If you have any questions or concerns, please contact us for further assistance.