Samsung Galaxy S2 + Android 4.x
Feat VPN works nice (only short tested yet on my phone) but since I upgraded last weekend to the new 4.0 Android Feat VPN writes:
This Android device has known issues...
Code M01 - L2TP ist not proerly implemented...
Why ? Before the upgrade it works/L2TP was implemented. And when looking in the system settings it still offers me following (advanced) VPN network types:
IPSec Xauth PSK
IPSec Xauth RSA
IPSec Hybrid RSA