86002: Session terminated: insufficient credits or funds for this credential

86002 indicates that the provider tied to the credential ended the Voice session because the credential no longer has available credit or has reached a provider-side spending limit. Check the provider account that backs the credential before you retry the session.

• The provider account associated with the credential has exhausted its available credit.
• The provider account or credential has reached a maximum monthly spend limit.
• If you use SIP authentication, the session can be using a credential from a credential list that is mapped to your SIP Domain.

• Add credits or funds to the provider account associated with the credential, then retry the session.
• Increase the provider-side monthly spend limit if the account has reached its cap.
• If you use SIP authentication, review the credential list mapped to your SIP Domain and confirm that the session is using the intended credential.

• Use SIP with Twilio Voice
• SIP CredentialList Resource
• Bring Your Own Carrier (BYOC) Trunking for Programmable Voice