I also use an S5 and normally don't have any issues. As the smart guys said, use airplane mode ON anyway. I'm pretty sure I've been ok with AP off, but w/the S5 you have to very sure you have no other networks around that you've previously connected to. The S5 will try to reconnect any time a n/w-router is closer. I normally have the S5 WiFi off, turn on the Breeze, then manually turn on WiFi via the Settings manual (gear). You'll see the Breeze pop in a few seconds, select and you're good. I always start with the S5 WiFi off using that procedure.
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