HTTPS access for mobile client

Please assist on access using mobile client over https connections

platform hostname is which accessed normally by browsing

Server address for mobile app does not respond with any of the following

Please advice

did you tried

it works with custom port say as HTTP
but once i moved to HTTPS, does not connect

Did u doble check if ssl port open in the firewall? Can u reach other ssl servers from mobile connection?

yes, it is opened, and the platform is already accessible via

Can u test from mobile connection:

telnet 433

And share results?