Steps for free trial of Sirius without having to use a credit card:
1.
https://www.siriusxm.com/hsbb30daytrial
2. Enter information, but leave promo code space blank and submit.
3. If it doesn't work, check to make sure it didn't insert a code for you automatically. If so, remove it and resubmit. Eventually it will process and send you an email with your password.
4. Go here and log in:
https://player.siriusxm.com/welcome
5. In the rare instance your log in doesn't work, reset your password and the new password they send you should work.