The format of MSIDN

MSISDN is a number used to identify a mobile phone number internationally. It is an acronym for Mobile Station International Subscriber Directory Number.The E.164 numbering plan defines this. This number contains a country code and a National Destination Code which identifies the subscriber’s operator. An example of a valid MSIDN in Cameroon is 237676676676.

Angular file upload with firebase

You can take the easy way out and head to and follow the guidelines set out for you and be done with it. You can get the code from the github repository . You are welcome to edit the styling as there will be default styling there that may suit your application style.