To increase your bitcoin trading limits, you have to increase your wallet level by completing a simple verification process. The process to increase your wallet level works as following:
Open the Relai app and go to "Profile"
Select "Settings"
Click on "My wallet level"
Select "Level 2" and follow the instructions
Verify your home address via GPS
Fill in your name, phone number and email address and press 'Continue'
Fill out the U.S. declaration to state that you are not a U.S. citizen
Successfully complete identity verification photo process
And that's it!