Copy WI (Weekly Increment) - If you want to create a recurring weekly scheduled SMS, "Copy WI" will create an exact duplicate of that scheduled SMS, but with a send on date 1 week later.
Navigate to Messages >Send Bulk SMS.
The Send Messages page will be displayed.
Select View Group Scheduled Messages option from the Actions drop down list.
The Group Scheduled Messages page will be displayed.
Click Copy WI button in the row of the scheduled message to copy its weekly increment.
The message box informing you about the copying of the weekly increment of the selected scheduled message will be displayed.