650-543-4800 or 1-888-805-1752 is The 24-hour customer service phone number of Facebook. Using this number, you will directly talk to a live technical agent on Facebook.
https://community.cisco.com/t5/discusiones-general/what-is-this-number-650-543-4800-is-facebook-number-fb/m-p/5087098#M16765
https://community.cisco.com/t5/discusiones-general/what-is-this-number-650-543-4800-is-facebook-number-fb/m-p/5087098#M16765
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