Hi,
As discussed in SX post (link below), I tried to setup FTP connection between Tramp and Android FTP server, but without success. Connecting via Terminal FTP client works without problems. I use Tramp for ssh connections without problems, as well.
OS: macOS 10.15.7
Emacs: GNU Emacs 27.1.90 (build 1, x86_64-apple-darwin19.6.0, NS appkit-1894.60 Version 10.15.7 (Build 19H2))
Thanks,
Adam