Wondering how facebook shows you the friend suggestion that you spoke recently in phone

 I did not give consent to Facebook to read my contacts in mobile.

Even i am not using the Facebook app, but using in mobile browser.

Day before yesterday I stored one very new person in mobile phone.
Today I am getting friends suggestion in Facebook.

How it is possible.

Your concern is valid, and unfortunately, the situation you're describing is not uncommon. Here's a breakdown of how it's still possible for Facebook to suggest as a friend someone you just saved in your contacts even without using the Facebook app:

🔍 How Facebook Might Still Get Access:

1. Facebook App Used in the Past (Even If Uninstalled Now)

If you had previously installed the Facebook app and allowed contact syncing, Facebook may have already uploaded and stored your contacts on their servers.

Facebook retains contact data even after uninstalling the app unless you manually delete it from their system.

So, even a newly added number, if it matches another user who also allowed syncing, could result in friend suggestions.

2. Messenger, Instagram, WhatsApp, or Lite Apps

If you use Messenger, Instagram, or WhatsApp, and these apps have access to your contacts, they can sync data to Facebook (since all are Meta-owned).

Meta shares data across its apps, so a contact added in WhatsApp can lead to a Facebook suggestion.

3. The Other Person Synced You

If the new person saved your number and uses Facebook with contact syncing, Meta may suggest them to you or you to them through mutual connection inference.

4. Mobile Browser Cookies + Device Information

Even if you're using Facebook only via a mobile browser, it can still use:

Cookies

Browser fingerprinting

Device information (especially if you are logged in)

Meta Pixel or tracking scripts embedded in other apps/websites

This helps Facebook infer identity and social connections.

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🛑 What You Can Do to Protect Your Privacy:

✅ 1. Delete Uploaded Contacts from Facebook

Go to https://www.facebook.com/mobile/messenger/contacts

You’ll see the contacts uploaded. Choose "Delete All Contacts."

✅ 2. Disable Contact Upload in All Meta Apps

Messenger App → Settings → Phone Contacts → Turn Off

Facebook App → Settings → Media and Contacts → Turn Off Contact Uploading

WhatsApp → Settings → Privacy → Contacts → Disable syncing (if Android allows)

✅ 3. Revoke Permissions on Phone

Android → Settings → Apps → Facebook/Messenger/Instagram → Permissions → Deny Contacts

Same for WhatsApp if needed

✅ 4. Use Privacy Browsers (like Firefox Focus)

These browsers don’t allow trackers and regularly clear cookies.