Not super tech savvy here,but I've been using SmartIPTV on a firestick to view non us channels was working great for months, all of the sudden it stopped and was getting Playlist error, connected to my phone Hotspot and boom it worked looks like the firestick is blocked by my ISP, took it to my friend house end boom it worked sounds like a block is in effect.
How do I unblock? Would getting a new modem help? I'm guessing the device ( firestick) is blocked by its Mac address?
Just use VPN on the firestick?
A VPN would probably sort it out for you