Don’t know how to upload contacts to facebook? Join Facebook Customer Service If you have facebook mobile app, and you want to upload contacts of your mobile phone to facebook, then it’s a very simple process. First of all you need to tap menu icon ( three horizontal lined), then tap option friends, and then tap upload contacts on button banner, and get started. If you could not find the options, or there are some other issues while uploading contacts, then you can come & join our Facebook Customer Service. https://www.msn-homepage.com/facebook-customer-service-number/