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What is showing on it to indicate its locked-out status? e.g. on the display, the indicator lights?
How new is it? less than a week old, perhaps? measured from date of purchase.
That's a fairly ordinary condition for a brand-new Uniden Bearcat -type radio to start out in.
You will need to program the channels, and unlock them.
Try this to unlock all the channels at once: press Func and L/O.
Then you will need to get programming software onto a computer, and program the channels and unlock them with that software while the Uniden is connected to the computer.
Hold down Func and L/O.... a message should appear about unlocking channels? and you should press E to confirm you want to unlock channels.
Then input several frequencies on several channels, pressing L/O a couple times, and then press Unlock+E, and that should unlock all channels.
You may need to set the Hold button before doing that, for it to work.
Just enter any frequencies, for a few channels. That's needed...