Default [Q] Zero bars then full bars when I make a call

I noticed on both my Note 2 and Note 3 that when idle I have zero or one bar and then when I make a call it jumps to three or four bars. When I hang up it goes back down to zero or one.

Is this normal? Is this a power saving feature? I'm not missing any calls or texts but just wondering why is is happening.
Samsung Galaxy Note 3
ROM: Tweaked Alpha 2
Kernel: LeanKernel 1.3

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