Default mobile network signal draining battery, help shut it off

Hello, I have a S4 that I want to use as pretty much a mp3 player, I have it laying around and can't use it because I don't get the network where I live now and I don't care to sell it. Is there a way to disable what is killing my battery in the screen shot I posted? Maybe completely disable the cellular radio. I don't care if it is permenant. It dropped 40% in 8 hours with out even touching the phone in airplane mode and wifi, gps off and no apps running, I did a task killer before I took it off the charger. I know its crazy to use such a good phone as a mp3 player but I have no other uses for it.
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