Hi to everyone

I haven't used the forum and my DM 800HD for ages and would like to update the image
I get a bit confused with talks of SIM etc. so unsure which one to try. Mine is an old original DM 800HD without SIM
WHat image would you suggest please?
Free IPTV channels would be a bonus although I would like the option to then add new IPTV channel lists
I hope I made sense.
Thank you in advance!