Yes, LINE: Calls & Messages may collect personal data such as your phone number, contacts, and usage information to enhance user experience and provide services.

LINE: Calls & Messages requires an internet connection to send messages and make calls, so it does not support offline use.

You can cancel your subscription through the app store where you purchased it, by going to your account settings and selecting the option to manage subscriptions.

The cost of a subscription to LINE: Calls & Messages varies depending on the specific services and features you choose, but basic messaging and calling features are free.