The Trimble R1 is able to get a 50cm accuracy by using an additional correction service on it's received satellite signals. This correction service ( RTX) is a yearly subscription fee that is covered by the ALIS subscription. To request a new code please make a request in the ALIS service portal - Link . Once the code has been received . Please follow these steps.
Download and install the GNSS-Status app for iOS on any iPhone that can be linked to the Trimble R1.