sockets - Android app that connects to server port 8080 -

so have been developing , android application fun in spare time. application opens connection home server running java program, calculations , sends response. issue not want use port 80. if cell phone on wifi can connect using port like, 8080. works wifi connection outside of home network. switch 4g , connection fails.

server:8080

• phone on wifi(any) - works
• phone on 4g - fails

server:80

• phone on wifi(any) - works
• phone on 4g - works

i switched server on listen on port 80 , app connect using same , connection works on both 4g , wifi.

is there missing make work on uncommon port?

or limitation of 4g connections.

thanks

i can assure it's not issue 4g ip connectivity. ports part of udp/tcp , "data" ip network.

however, possible cellular provider has firewall prevents traffic ports. portquiz public website listens on ports. using browser on phone, try connecting various ports , see successful , not.

http://portquiz.net:8080  http://portquiz.net:8  http://portquiz.net:666  

if can connect via wifi not cellular, provider doing things shouldn't.

if browser can connect port 8080 of server , app cannot, it's app.