(Requirements : jailbroken iPhones 3G/3GS/others,ipod touch running OS 3.1.3, 3.1.2 or OS 2.x)

(The software may work other iphone 3.x OSes, but hasnt been tested for them. Please pass us feedback on your experience.)

Using your iphone, please go to Cydia, and then Manage, Sources. Then Edit sources then Add and then add the following url under Add Source.
For iphone OS 3.1.2 and 3.1.2
http://www.iopenvpn.com/install/
For iphone OS 2.x
http://www.iopenvpn.com/cydia/
The source should appear under Entered by Users.
Then, repeat the above process for
http://cydia.iphone.org.hk/apt/
The first one is our app. while the second one is a software called DNS fix which we use to set DNS when iopenvpn is connected with the iphone connected via carrier. This software is a dependency and will get automatically installed while installing iopenvpn.

Again go to Cydia, Manage, Sources, click on www.iopenvpn.com and install. After installation, an icon should appear on your iphone/ipod touch Home screen.