Truphone have updated their Android VoIP app to support the Google Nexus One.  The software – Truphone v3.0.2 – now supports the Nexus One, T-Mobile Pulse, HTC G1, Hero and Magic, and offers free WiFi VoIP calls between Truphone users as well as to Google Talk and Skype accounts.

There’s also an IM client baked into Truphone, which supports Skype, MSN Messenger, Yahoo! Messenger, Google Talk and AIM accounts, and as with other VoIP systems we’ve seen they’ll happily take your cash in return for lower cost international calls.  WiFi VoIP is a relatively new addition to Truphone; when the app first arrived for Android it routed calls over a regular call.

Unfortunately this latest version has some issues too, though only if you’re a Google Voice user.  Gear Diary report that, while they had Truphone installed, Google Voice regularly crashed and their Nexus One ran slower than usual and suffered periodic lock-ups; the issue was fixed when Truphone was removed.

Press Release:

Truphone First to Bring Wi-Fi Calling To Nexus One

Truphone’s new Android application updated to operate on Google’s new device
LONDON – 22 January 2010 — Hot on the heels of the release of Truphone’s VoIP enabled Truphone for Android application earlier this month, Truphone, the next generation global mobile operator, today announces that it is the first company to provide Wi-Fi calling on the Nexus One device from Google.

Following collaboration with Google, Truphone is pleased to announce that from today Truphone for Android is compatible with the Nexus One.

In addition to compatibility with the Nexus One, the update (version 3.0.2), ensures compatibility with the T-Mobile Pulse, meaning that Truphone is now Wi- Fi compatible with a total of five Android devices (see original release for list)

Karl Good, Director of Applications for Truphone said: “Google has been very helpful in working with the Truphone team to allow us to provide our award- winning solution to the growing number of Nexus One owners. Once again it is a testament to Truphone that we are the first to be able to offer this technology to consumers.”

Truphone for Android (version 3.0.2), is available now as a free download in the Android Market.