How do i contact siriusxm? Contacting Sirius/XM - by phone or otherwise. While 866-635-5027 is Sirius/XM's best toll-free number, there are 12 total ways to get in touch with them.How do i cancel my siriusxm subscription? The next best way to talk to their customer support team, according to other Sirius/XM customers, is by calling their 866-635-5020 phone number for their Cancel Services department.What are the hours of the siriusxm call center? The Sirius/XM call center that you call into has employees from Pennsylvania, Dominican Republic, Canada, Texas, Iowa, New York and is open Mon-Sat 8am-11pm, Sun 8am-8pm EST according to customers. In total, Sirius/XM has 6 phone numbers.How do i reset my siriusxm radio? Reset your radio by sending a refresh signal. Listen to SiriusXM on your phone, at home and online. Not Registered? No Problem! Registration is fast and easy. Have the Radio ID or VIN of your old car handy.