Octro, Inc. has partnered with Voosie.com for cheap termination rates. For a limited time, if you purchase $40 worth of credit from Voosie.com, you can get OctroTalk for Symbian absolutely free.
After purchasing the credit from Voosie.com, just send an email to email@example.com for your free OctroTalk license activation.
If you use OctroTalk for iPhone, Desktop, Mac, Android or Blackberry, you no longer need to purchase OctroTalk SIP credit to make calls over 1 minute. You can make unlimited calls through Voosie.com for free.