[Mi 3 Accessories] i snort flour:
The only part of this case that is aluminum is the outer edge and on the bottom a couple inch's by the camera, the rest is rubber, plastic and glass. Besides it don't matter what case you use the signal loss will not have any significant effect or you would lose signal every time you went into a building (cement enclosures are an exception as they are very thick). Your loss of signal is due to the poor quality radios in these phones and your carriers cheap tower output. I have had 3 of these cases all of them worked just fine if you didn't mind it bulking your phone up a quarter inch all the way around its borders. I have had my phone out of this case for 3 months now and the signal has remained the same 2 to 3 bars sometimes no signal sometimes 4 to 5 bars but on average 2 & 3 bars of reception.

Just be sure you order the right case for your phone as the buttons in the case are different for the mi3w vs the mi4w and this is probably why petiole are having button issues. I love the extremely thick glass in them though I think it's just tempered glass and not true gorilla glass as it is not really all that scratch resistant but when you can pick them up for under $15 shipped who cares.

---------- Post added at 01:28 AM ---------- Previous post was at 12:30 AM ----------

As far as waterproof goes no it's not waterproof as that is virtually impossible to do with a case and I believe is just poor translation. Highly water resistant is more correct. It stops water really well from your dangerous areas (charging port and headset jack) which could cause a bad short but it will slowly seep into both your speakers. I through mine into a mud puddle for a few minutes and it came out playing music but started freaking out for a few hours while trying to use it (mostly functions on the bottom of the device such as the home, back buttons, the 2 apps next to the app drawer and trying to hit return and send button on the keyboard or messenger was impossible). The second time it got wet from getting soaked by a downpour of rain and it started freaking out I tried simply removing the phone from the case and it worked fine it was just condensation under the glass. They are cheap cases and do break down after a few months losing their adhesive that keeps the buttons and screen sealed to the aluminum frame. I give the case a 7 out of 10 as it does a great job protecting it from daily water problems such as you accidentally drop it into a toilet or pitcher of beer or a puddle of water and retrieve it quickly because the cloth used over the speakers dramatically slows water seepage to a slow drip. It does a great job at protecting your phone as my first case proved when it fell onto the concrete from my coat pocket which was a 5 or more foot drop as I was climbing down from a railcar. Plus you can get them on eBay cheap if your not picky on color. I paid $13 shipped for my last one

The reason I docked it 3 points is because

1. The so called gorilla glass 3 is a flat out lie (it is an insanely thick piece of glass though that made me like it) that scratched easily over time but wasn't unbearable like film screen protectors get plus it not being truly waterproof.

2. The screws are easy to over tighten and strips the threading on the aluminum case if your not careful plus if you don't use locktight can vibrate themselves free and fall out on you if you have a job say as a forklift driver where your phone has constant vibrations.

3. The sealant which seals the glass and buttons eventually breaks down and allows condensation to build up from humidity in the air which will make your phone spaz out kind of like but not as extreme as if you just got it wet until you let it dry out or take it out of the case and wipe down the screen after a period of 6-12 months.