I put a T-mobile sim card on my VZW Note 3 and added an APN to for the mobile network, the 4G LTE flag shows up in the status bar as expected. The only problem is: when it uses data network instead of WIFI, all non-http network connections seem to get blocked and the only thing I can do is to use the browser to surf Internet. All other apps such as WeChat, Skype don't work at all. WeChat keeps reporting "Server access failure (1, -10087)".
I suspect there's a firewall built in the T-mobile data network but couldn't find any settings about it.
Does any expert here know to solve the problem?