OpenVpn not workin on w52p

[crzy]

Hi i would like to know
1. i have set up OpenVPN and its working fine, but over the vpn is too latency and break ups so its almost not possible to hear each other, also there is a delay on voice,

2. second issue is that i have a setup over the vpn default gateway Push from the server, and if i connect with same config on PC ist passing all traffic over the vpn, and on the phone its not, how and what settings i need to add on server config and client config so all phone traffic goes thought vpn connection.

Thank you for your replay