Unique to SFMC
Subscriber Statuses
Subscriber Statuses
Phone number click tracking
Phone number click tracking
Although this doesn't give you tracking when someone types in the number, if they click on it from their mobile phone you'll be able to register a click and can even log that back to Salesforce with a query, automation, and journey.
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Subscriber Deletes
Subscriber Deletes
When deleting subscribers out of SFMC, mobile studio deletes all subscribers with that common phone number, not just those that have that subscriber key. You have a limited time where the deletion can be stopped without help from SF Support and SF Support can take days to stop a deletion. Always set a minimum suppression period of at least 7 days.