Then it's defective.
I don't know why people put up with defective phones and decide it's a design issue but they do.
The metal case has nothing to do with it. The active antenna technology works. This metal case meme needs to die.
I've seen the design question come up with plastic HTCs too.
I was out in the desert today and didn't lose signal when others did. Drove into Albuquerque, was the first or maybe second to pick up LTE, next to the S5 and an iPhone.
And I'm on Sprint, even roaming into Verizon last out in the desert. Hardly the sweetheart reception scenario! :rofl:
To all reading - I don't care what you buy, but check out reception (and everything else) and exercise your consumer rights, right away.
Never hope that an update or rooting will fix bad hardware.
Never give up on your first choice for another model unless a) it's a coin toss for liking a different model or b) you try first to see if you're the victim of a lemon.
Regardless of Internet Wisdom, they crank these things out like matchbooks and expect you to return bad ones rather than spend the money and drive costs up testing every thing on every one.
And yes, watch out for open box replacements - a lot of these bozos will take back a lemon and pass it on to the next guy.