doesn't appear to be, I guess you would have to ask them. Here is the small print
Visit onstar.com for details and system limitations. OnStar acts as a link to existing emergency service providers. Services vary by model and conditions.
OnStar Hands-Free Calling requires a Hands-Free Calling-enabled vehicle, existing OnStar service contract, and prepaid minutes. Not available in certain markets. Calls may be made to the U.S. and Canada only.
Offer ends 1/1/2012.
If you are deaf, hard of hearing, or speech impaired, you may now use the dedicated TTY connection to call us toll-free at 1.877.248.2080, or email us at [email protected]
for assistance or with questions regarding your OnStar account.
Would you like to unsubscribe from future OnStar email communications?
Would you like to update your email address?
Do you have questions or concerns? Please do not reply to this email. Contact us for assistance.
You can contact OnStar at the following address: Attn: OnStar Subscriber Services, P.O. Box 1027, Warren, MI 48090–1027.
© 2011 OnStar. All rights reserved.