TunnelBear is a simple, secure, and free access VPN product that works on the iPhone and iPad. It lets you choose the location of the content that you want to access.
I used free VPN services before, but found some major speed/bw limitations ,and they only have a handful of servers. Now I switched to this VPN service: http://www.sunvpn.com/, it`s faster, more servers to choose from, the big downside is that it`s a paid service…
So far the Best free USA VPN service I have been using is:
I am using Hotspot Shield Free VPN. However free version is ad supported, but its good from all other available free vpn’s. You can surf anonymously and access all blocked websites using HSS.
Check it out here: http://www.hotspotshield.com