IP PHONE showing on display - configurable?

I have an S300 and an S405 that both says IP PHONE when they snooze. Is this configurable to say something else? I assume a logo is not possible on these phones?

I also have an S500 that for the life of me I cant get a logo to work on. I created one the exact size and still never shows up.

I actually have the same question. My client wants the time and date displayed on the phones when idle however I cant seem to find a place on the config to change that from IP PHONE

Since they are Sangoma phones, have you submitted a support ticket (or a Feature Request in Issues)? You get unfiltered information from the manufacturer that way.