Facebook Login With Mobile Number
If you have not currently register your telephone number with Facebook, you can do so now by going to your Facebook page, Setups from the fall menu on top right edge of the web page, click the Mobile section, and after that enter your contact number as instructed on the screen. You have to confirm your phone number by entering the code sent to that phone number before it can be usable in Facebook. Once it's confirmed, you can log in to your Facebook with your phone number.
You could also decide to receive notifies by SMS message whenever somebody sends you a message in Facebook. If you are stressing if Facebook would certainly flood your SMS with alerts, you could control the daily limit of texts and time of the day Facebook can send you SMS signals.