How to chose the encryption type for user details?

I’m a mobile app developer developing an app that gets input from users like mobile number, email id, and user name. I’m a bit confused about how to select the encryption method like Symmetric or Asymmetric and how to transmit the data from the app to the server. What are the secure ways of transferring the data to the server and how should I encrypt those data and encryption methods to be used. Please help me resolve this. Thanks in advance.