I had a subscription for 3 years with a provider that I'm no longer using now and I can keep the Sets.
Will I still be able to use them ? As they had a software installed on it with the logo of the company and everything so I think this might be a customized software of some sort.
I was wondering if I can use them still without subscription maybe like a regular setup box ?
It's Cisco set
What is an IPTV set? Do you mean a pre loaded android box. You should be able to use it normally. Maybe even delete it all and start fresh.