Im not certain but it sounds like your battery may just be about dead…Luckily, many Samsung phones can have their batteries easily replaced for cheap.. If your battery looks as if its swollen, that is good indicator that some of the battery cells have died
https://www.youtube.com/watch?v=1N7R9nRO... The guy also has a link to buy the replacement battery on amazon in the video discription. hope that can help.
Here's a great video in high quality showing exactly how to do it. https://www.youtube.com/watch?v=eQfb52LQ... I believe the replacement battery model is: GH43-04699A DG
I don't think a network would 'block' the watch if payments are still being made on the watch (or if someone decided to just stop paying the bill). The way the gear 4G LTE/phone number works is you are essentially paying the network for a phone line. The watch has its own individual phone number...so even if i network did block it for some reason, you could simply get the watch's cell number changed and it probably would no longer be blocked. Hope that answers your question (granted this is a late response). DG