Rakuten Link Office

This app offers unlimited free calls and messages for Rakuten Mobile corporate cellular plan subscribers.
Core features:
・Rakuten Mobile Corporate subscribers can make unlimited calls and send Link messages to Rakuten Link Office users, as well as to other mobile networks and landline numbers in Japan. Calls to mobile phones and landlines including other carriers in Japan are free when calling to a Japanese number (some numbers not included).
・You can create chat groups with other Rakuten Link users for up to 100 people, and share photos, videos, and documents, as well as messages.
・Register and edit contacts in sync with the default address book on your phone.
Please note:
・Communication from Japan to overseas and from overseas to overseas with pay-as-you-go billing by country / region (SMS to countries and regions covered overseas is free).
・Emergency calls not available when in overseas roaming areas.
・Usage charges, overseas roaming (data communication) and international calls, and international SMS service areas and provision conditions are subject to change without notice.

For more detailed information, please refer to links below(Japanese):
https://business.mobile.rakuten.co.jp/service/rakuten-link-office/
・Activation Manual
How to setup Rakuten Link Office on compatible iPhone models (Not compatible with iPad, iPod touch)
https://business.mobile.rakuten.co.jp/support/link/setting/activation-ios/
・How to use
https://business.mobile.rakuten.co.jp/support/link/manual/guide-rakuten-link
・FAQ
https://business.mobile.rakuten.co.jp/support/
・Sending feedback/Support request
Please consider logging out and back into the app or reinstalling it as well.
https://business.mobile.rakuten.co.jp/support/link/manual/feedback-ios/
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