ワンナンバー設定 is an Android app developed by NTT DOCOMO. It falls under the Utilities & Tools category and is available for free. This app allows users to conveniently manage the registration information for their One Number Phone (子機) and copy the phonebook data from their parent smartphone (親機) to the child device.

With ワンナンバー設定, users can easily set up the necessary information for their One Number Phone, ensuring seamless communication between the parent and child devices. The app also enables users to effortlessly copy their phonebook data from their smartphone to the child device, eliminating the need for manual entry.

Please note that the use of this app requires the presence of a child device.

For more information about compatible devices, please visit the official NTT DOCOMO website.

If you have any inquiries or need assistance, you can contact NTT DOCOMO directly. If you are calling from a DOCOMO mobile phone, dial 151 for free. For calls from other phones, including landlines, dialCustomer support is available from 9 AM to 8 PM, year-round.