%\setbeamertemplate{footline}{Your Footer Text \hfill\insertframenumber/\inserttotalframenumber}
But which actually removes footer graphics. A workaround I found to place slide number in Short Title of the presentation. So, you can use this in your
\title
command : \title[My short title \hspace{25mm} \insertframenumber/\inserttotalframenumber]{My Title}
The resultant output :