Firebase authentication

Description

Here is the enhanced description of the project:
We require a freelancer to troubleshoot and configure Firebase OTP authentication for our mobile application built on Flutter. The authentication is currently working only with one mobile service provider in Zambia. The issue is that OTPs are being sent but not received on the end devices. The freelancer will need to investigate the problem and identify any configuration or network issues that are preventing the OTPs from being delivered successfully. They will also need to ensure that the authentication process is properly set up and functioning on both the app and website. The freelancer should have experience with Firebase authentication and be able to work with Flutter to resolve this issue.