You ought to be ashamed of yourself.
If the landlord left his house unlocked, would you take advantage of that as well? Maybe help yourself to some valuables, maybe a bite to eat?
How is that situation analogous in any way? Is talking a lot on a phone when you've paid for an "unlimited" plan the same thing as paying your bill with a stolen credit card? (It's not.)
Your pathetic rationalization is ridiculous.
If you've paid for an "unlimited" plan,
of course you have the legal and moral right to be on the phone 24/7.
Did the OP say he paid for an "unlimited" electricity plan?
I rest my case.
This world is fast becoming a ####hole because of selfish people like the OP. It's all about "me, me, me".