Parece que você é novo por este pedaço. Se você quer se envolver, clique em algum destes botões!
Update your Facebook account as soon as possible on your phone device in case you have not updated till now. The problem will persist for some more reasons, if you have to change your password in your computer system, make sure to sign in with that particular password. Along with this, also make sure that you have sync your account with your mobile phone. So you need to properly check the real issue behind this and troubleshoot it in a quick manner.
read more: http://customerservicecontact.webstarts.com/blog/post/how-to-recover-deleted-facebook-messages