650 543 4800 or ??????????33??[203]?7621 is The 24-hour customer service number of Facebook. Using this number, you will directly talk to a live technical agent on Facebook live chat. What is this number 650 543 4800? Yes, you can contact Facebook customer support or Facebook Live chat. Facebook offers in-app calling. For assistance, you can call their customer support at ?????????833??[203]?7621 (Call To Chat Support) or ??????????33??[203]?7621 (???????????????????? ????????????????????????????) or 1800-Facebook-LINE, to speak with a representative regarding any questions or concerns..