1.APN: airtelgprs.com
2.Activate 3G for better speed.(if HP works with 3G spped no need to bother)
3.Install Hammer VPN-Download Here
4.Lport-9201
5.Rport-0
6.Select any free server
7.leave other field as it is ..u dont have to be advance.
8.Tap connect
9.if u see Authenticating (successful DNS)
10.Speed 5-150 Kbps
11.When you will get server is full (try different server)
Unlimited Tricks:-
If u see your daily limit reached
Then disconnect internet
Uninstall Hammer VPN
ES fileexplorer - internal storage - android - DELETE playstor.srf and hammervpn Folder.
INSTALL Older Version hammervpn
It will get Connect.