No credit card needed to try RingCentral Fax for 30 days. You can try all three plans FAX750, FAX1500, and FAX2500.
How to Get RingCentral Promotion for the Fax
You don’t need the coupon code to get the offer. Click on ACTIVATE OFFER, you will see the RingCentral Promotion page. Just select the Start Your Free Trial at the Fax plan. Follow the remaining steps. You will get the Free at checkout with the 30 days plan.