See the post from Rene a 'super mod' at Prisontalk forums
http://www.prisontalk.com/forums/showthread.php?t=540763&page=6#post6898367Please be aware that it is against Federal BOP and many state DOC rules for an inmate to use "third party" services that try to reduce prison call costs like GoogleVoice, ConsCallHome, or PrisonCallSolutions (and many others). Those services forward calls to another line, and call forwarding is not allowed. If you have GoogleVoice or one of these other services and your loved one is calling you, you are breaking those BOP or DOC rules. When the BOP or DOC finds out (and they will eventually), you will lose visitation and phone privileges. Google Voice forwards calls to a different line. Facilities have the technology to detect forwarded calls. When the facility detects a forwarded call (and it could be tomorrow or years from now), there are consequences. One of those consequences is disallowing the inmate to call the number that was forwarded and the person who owns the forwarded-to phone could be taken off the inmate's visitors list. I know the calls are expensive, but we have to follow their rules. I'm sorry.
Since call forwarding is not allowed by the facilities, discussing "how to" get those services borders on illegal activities which is against PTO policy cited below.
Please be sure to check with the facility first! It's better to be safe than sorry!