steve288
Authentication failed
Those VPN settings match my old iPhone 3G, except for Server: I use a domain name, and that phone works OK with VPN to sme 7.6 & 8.0 servers.
I have Send all traffic On, but that just sends traffic via the VPN connection & the remote gateway, instead of via your local gateway, it is probably appropriate that you turn it On.
I do not think that will change or fix your problem though, as it seems to be an Authentication issue.
Look in the messages log file on the sme server you are trying to connect to around the time you make the connection.
You also need to look at your local WiFi network & router & gateway to see that they ALL support the required protocols for VPN.
Check any log files on your local equipment.
Also see this article for tips & issues re gre protocol 47 & required ports etc.
http://wiki.contribs.org/VPN_practical_tips#Background_informationIn the logs look for gre issues
Do those other 4G iPhones that work OK elsewhere with VPN, also work on the same network & WiFi connection that you are using ?
You need to test another similar device on your actual network. If an iPhone that works elsewhere does not work on your WiFi connection, then you likely have a local problem.