The PPTP encryption scheme is less secure, but the other problem is that it might be blocked at the firewall. If I remember my VPNs correctly, PPTP uses a diffe

The PPTP encryption scheme is less secure, but the other problem is that it might be blocked at the firewall. If I remember my VPNs correctly, PPTP uses a different port and protocol (GRE), so it can easily be blocked by overly restrictive firewalls. OpenVPN, on the other hand, can go through TCP 443, which is all but guaranteed to be unblocked. But, you're right that there isn't any iPhone support for non-jailbroken phones. I'm not sure about Android, but I see less of a problem getting it working on an Android phone.