Lync 2013 on mobile Cached files

I was wondering if Lync on mobile device (android, IOS, windows) has cached files or not. we know that for desktop we have cached files in location %localappdata%/Microsoft/office/15.0/Lync/ also we have cached credentials. similarly is the information stored in the local phone memory. If yes where can we find it ? phone memory or external SD card ?

Many thanks,

DN