About mongoDb Connection

I am new to MERN and I am building an todo app … I used mongoDbAtlas for my db and i am connectiong app through mongodb srv and I am connecting my frontend deployed in vercel…The issue is the deployment is successful endpoints are working both locally and deployed link too till I am working on laptop but when I paste the same link to view in my mobile phone the connection gets refused as I connected my phone and inspected the page through adb the connection gets refused I am very much confused how is that possible…I even added 0.0.0.0 IP address for all connections Cant figure it out please help!!