For adding new number to your account you just need to follow these steps: <br /> <br /> 1. Click in the top right corner of the screen. <br /> 2. Click Settings and then click mobile. <br /> 3. Add another mobile number to activate a new number. <br /> 4. Enter your phone number and select how your option to confirm it, then click Continue. <br /> <br />On having any technical issue regarding facebook, you can directly contact us on toll free number +1-844-260-7869 to take all relevant solution.