Broadcast/Communicate to Users not routinely logged in and without email

Summary:

Our business case is based on the need to communicate company information and messages to employees working in assembly situations who do not routinely log into Oracle HCM or have company e mail addresses. Mobile Devices are the preferred method if they do log in. New messages need to be broadcast at least on a daily basis. Does anyone have experience or ideas on what tools to use to configure this.

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