The vpnbook is blocking the udp ports.... pay for vpn cheap...
I use premium vpn with 3g and i not have problem.
I use this: (not easy setup)
Openvps settings:
http://tuneshub.blogspot.no/2013/09/openvpn-for-rooted-android-gingerbread.html?m=1
I'm installed this:
https://play.google.com/store/apps/details?id=com.mgranja.iptables&hl=hu
For wifi tethering:
https://play.google.com/store/apps/details?id=og.android.tether
settings:
forum.xda-developers.com/showthread.php?t=1993689
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