Start
by clicking down arrow from the top right of Facebook, then you will reach out
to the ‘Settings & Privacy’ section. Here, you have to click on
the ‘Settings’ option and then select the ‘Blocking’ option. Now,
you should click on the ‘Unblock’ option given next to the person’s name.
Lastly, you have to click on the ‘Confirm’ option to the operation says how to
unblock someone on Facebook messenger.
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