I have noticed that Facebook has been recently recommending people who have texted me. It has been able to connect their number (I believe most of these people are using iPhone) and connect their Facebook profile to mine.
How is this happening? How does Facebook access these texts and connect them to users?
Furthermore, how can I stop this? Obviously my security setting have failed somewhere.
I use an iPhone 4, Chrome and Safari on my Macbook Pro, mid-12, OS X Yosemite 10.10.4.
EDIT: Based on questions, I do not have the Facebook app and I do not have Whatsapp. On my iPhone, I have Safari, Google Chrome and DuckDuckGo, but I have never accessed Facebook via my iPhone. All people being recommended online are individuals I have contacted via iMessages. How is Facebook getting this information?
EDIT 2: I think we've established FB must be using iMessages. Probably these individuals have the FB app downloaded to their phone, and FB is accessing their iMessages and connecting us. How is FB doing this? What are the internal dynamics at play here? Facebook accesses their SMS data?
EDIT 3: In order to discuss the dynamics of how the Facebook app accesses smartphone data, I've opened up a new (but related) question here: How does the Facebook App on iPhone access the SMS data from iMessages? What are the details?