There are several steps to take to troubleshoot why emails may not be received on your mobile data:
- Check your mobile data connection
- Check the security settings of your email application and account
- Make sure your data is turned on for the email application
- Check that your mobile email provider supports and allows mobile data
- Make sure your account is set up correctly with your provider such as POP3 or IMAP
- Check that the IMAP/POP3 settings in the email application are correct