I'm trying to set up VPN on my phone for the first time. However, it gives out "server hung up" error, claiming possible problems with the firewall. So far, these are the test cases I tried it on: From a desktop out of the network, I can connect just fine. I can connect through wi-fi on the local network. I cannot connect through 3g. Didn't find a good reception for 4g yet. When using internet pass-through from a desktop out of the network, I cannot connect. Everything is done through pptp. What stump me is that I could connect from a desktop. Therefore, I'm assuming my firewall settings must be correct. Are there special settings that I must make when connecting through my EVO 3D.