A friend of mine uses smoke black to match his matte black iPhone 7+. Sexy-looking I have to say

I bought this case. Smoke black.

Here are some photos from amazon. It's not mine. Look sexy right 

Yes.  Rm50 include postage after using coupon at 11street 

I got halo effect when using cheapo sp, now using monodesign matte sp from dino89 no more halo effect

try pressing the sp along the side of the screen protector (every side from top - bottom - left - right).. apply more pressue on the halo effect area and hold for 1 mins.. see if this helps

I agree with him here. Try the monodsign matte tgsp from dino89. The cutouts on the tempered glass is one of the best, and the adhesive is great too, very little to no air bubbles at all 

Halo effect is a very common issue since 2 years ago for nearly all flagship phone.

Certain tempered glass no issue as it is cutting down smaller or using certain way to make you feel no halo effect (like those coloring up the whole side match with phone color - MONODSIGN DURAGLASS Full Cover 3D is one of this type).

Lucky I am type of not using tempered glass or SP. So this issue never is issue for me since year 2010 till now.

First using tempered glass but dislike the halo effect. Change to normal cheap sp. Been using for a month still fine for me.
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this from my experience is bad quality TP.. i have applied at least 20 SP over the span of 3 - 4 years and never seen this before - what brand and model u use?

for my case. on low power mode. and off low power mode is the same.

overnight dint use also drop 7-8% (tried both on & off low power mode) 

your battery drop how many % overnight ya?

Tip.. its the same back screen protector for both Iphone 6 and Iphone 7.