It seems like the day is getting closer and closer when anyone can pick up their cellular phone and talk to their heart’s content without paying a penny. Woize International has developed Woize for Smartphone (or SmartphoneWoize), allowing anyone with a Windows Mobile 5.0-equipped PDA phone to make free calls over VoIP. Users can simply connect to any available Wi-Fi connection, “borrow” some bandwidth, and chat away.

Woize has already released its VoIP client for the PC, and by adding a smartphone variation to its digital communications portfolio, users can now easily make calls whenever their PDA phone is connected to a Wi-Fi network.

In tandem with this release, the company has also launched a new Beta 3 version of PocketWoize, a client it has developed for Pocket PC applications. Unfortunately, it seems the “free” calls are limited to only those served under the Woize umbrella (Woize, PocketWoize, and SmartphoneWoize users), with a per-second billing for calls to other people.