Hi Edgar,
Thanks for getting in touch. Registering most SIP phones is a pretty straightforward process. We have a few resources available to help guide you.
We have a help video that walks you through the steps of registering a SIP phone (though all SIP phones are a little different, most are similar). Just click on the link for, "Registering A Phone" on the left panel:
https://www.ringroost.com/help-videos.php
We also have a text guide if you prefer that method:
https://www.ringroost.com/how-to-set-up-and-register-a-sip-phone.php
I hope this helps. Let us know if you have any lingering questions.
Thanks,
RingRoost Support Team