I know it was the network, and the company, the fact that is was down to SOFTWARE LICENCE from a 3rd party company that caused the isses, effectively puts all phones in to a polling mode to repeatedly ping the tower, that take huge amounts of energy which is why tower pings are only initated when you enter in to another cell from another cell coverage.
I do know how networks work you know.
So your battery gets sucked dry, if you have an older phone from 10 years ago, not so much a problem, a smartphone, even with battery management software, will run out very quickly.
Next time you wonder why your phone is low on battery and you don't know why, try to think how many cell's you passed through and how often.
If you travel the entire M1 then you are passing a few hundred towers as a tower has a 45 mile range but due to terrain and other factors including the earths curviture and other factors such as if you are near a large body of water.
So the typical maximum range is around 22 miles for a cell loweing to a few square miles in densily populated areas.
So a network goes down, the phones can not connect to the towers and because the network is not there.
Its like your table on a wifi, move too far, the speed slows down of data, so you can not be too far from any tower or the network or in the case of a wifi, close to the connection source.
People are too simplistic in their replies, all to ready to gloss over the fundermental workings of a system, in my world, its better to know how it works than be told how it works from a vendor.
My knowledge of networks was covered in a course for network administration and part of that course covered mobile phone, mobile networks, mobile security, and how vpn's for mobiles and offices are set up and so on...
So I do knpw TYVM, I don;t need to be told I'm talking out the top of my head as I am not, 🙂