Privacy groups in the U.S. have complained to the Federal Trade Commission that changes last week in WhatsApp’s terms and privacy policy breaks its previous promise that user data collected would not be used or disclosed for marketing purposes.

The Electronic Privacy Information Center and the Center for Digital Democracy have described the changes as unfair and deceptive trade practice, subject to an investigation and injunction by the FTC, in their complaint Monday.

WhatsApp said last week it will be sharing some account information of users with Facebook and its companies, including the mobile phone numbers they verified when they registered with WhatsApp. The sharing of information will enable users to see better friend suggestions and more relevant ads on Facebook, it added.

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