u/Xlaredo

We are building an in-elevator advertising network of screens that are Android 9+
and I can connect via a 4G SIM no problem. I am looking for the best CMS system that
1- Auto-boots and resumes loop.
2- Offline continuity
3- Scalable to over 100 screens
4- Easy to manage
5- No physical device needed
6- ACTUALLY WORKS AND RELIABLE

Thanks in advance