This is the message support sent me. Just wanted to share the address to send them back the 502.

Code:
Once you received the PaP2T device please can you return the GT502 using the following address listed below:

VOIPo
11251 Northwest Freeway
Suite 200
Houston, TX 77092

Seeing as this is part of a recall, We'll issue a $4.95 credit to your VOIPo account when we receive it.
This should cover the cost of postage.

Please let us know if you have any further questions or concerns.

Thanks