I used Ftp2 to upload/download file in iphone/ipad app, and it ran well more than one year.
I guess tmobile upgrade the network. my app can work on ipad(tmobile 28.3), but can't work on iPhone(tmobile 28.4). I tried att/version, both are good. so the problem is tmobile 28.4, it is IPV6 issue?
please help.