Should cell phone and desktop eM Client have same IMAP and SMTP settings?

The IMAP setting on my desktop is 993 and the SMTP is 465, however, my cell phone shows 993 and 587, respectively.  Should they be the same?

Many mail servers use 465, but it is not officially a recognised port for smtp.

It comes down to what your provider suggests, or better - what works. I use GMail, and the settings in eM Client are 465 (use SSL/TLS on special port - legacy) or 587 (use SSL/TLS if available). Both work.