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Tips Tempered glass screen protectors – Warning

Discussion in 'Android Devices' started by Snakeyeskm, Apr 19, 2017.

  1. Snakeyeskm

    Snakeyeskm Android Expert
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    Just one person's opinion. For those considering a tempered glass screen protector for their galaxy S8 and S8 + here are some thoughts based on personal experience.

    – Glass protector sellers basically got their beta testing done on the galaxy S7 edge. The primary problem was making these protectors case-friendly as they were a huge number of complaints of popular cases causing these protectors to lift off the screen. I personally experienced this with 3 different brands including Zagg's well fitting and expensive tempered glass. Most manufacturers seem to have solved this problem by changing the size prevent edge pressure by cases. However attachment off the tempered glass screen protector is still fairly major issue.

    – Different sellers had different methods of attachment both in the type of adhesive and the area of coverage of the adhesive. Practically all of them applied adhesive along the outside edges of the tempered glass protector. Zagg for example, had a more extensive band of adhesive and apparently a better quality of adhesive than the cheaper versions available from most other sources. Unfortunately, at that point, there were very few case friendly versions – none that I could find. However clearly the glue application was critical for adhesion and more importantly sensitivity of the screen.

    While the screen protectors definitely provided excellent scratch protection (relative to the more flexible traditional screen protectors) they provided little protection from breakage. The best way to describe this limitation is to consider the example of laminated wood. Laminated wood gets its strength and flexibility by gluing layers of thin strips of wood. Remove the glue and just stack the layers and the strength and flexibility disappears. The same thing applies to tempered glass screen protectors. The primary surface of the tempered glass protector just lies on the surface of the phone. It takes very little force of an object to crack and penetrate through the very thin surface of the screen protector and onto your phone' s screen. There is some protection but not great and unfortunately in many cases a loss of sensitivity. I can attest to this by personal experience on the galaxy S7 edge.

    Clearly the technology/production/adhesion process is improving and manufacturers (again using Zagg as an example ) are promising new and better products down the line. As much as I would like fellow members to Beta test their galaxy S8's,

    Bottom line I would suggest some patience as the evolution is continuing rapidly, especially as Samsung has committed to a curved screen with the iPhone apparently moving in the same direction.


    Check out this particular website and brand that seems to have addressed a lot of these issues for the galaxy S7. Watch the video and the follow-up video that shows how easily this protector can be removed. their S7 version is available via Amazon, no S8 yet. Not recommending it, but curious.



    https://www.amazon.com/s/ref=nb_sb_noss?url=search-alias=aps&field-keywords=Whitestone+Dome+Glass
     

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  2. Hadron

    Hadron Smoke me a kipper...
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    The latest rumours are that Apple will be using an edge-to-edge flat display this year (though at this point I don't regard any story as definitive). Though given that Sammy have been selling curved screen phones for several years now I'd think that screen protector manufacturers should already have all of the motivation they need.
     
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  3. blackcar

    blackcar Well-Known Member
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    thanks for the post, i purchase one, but I am still on the fence about using it. have a few days to decide before i am stuck with it.
     
  4. Hadron

    Hadron Smoke me a kipper...
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    Pun intended? ;)

    My daughter has found them to work well on her phone (which she drops a lot), but that has a flat screen. It is something I've been thinking about should I move to an S8 (still possible, since there are few phones < 7cm wide these days, so it's a better size for me than almost anything else).So if they don't work so well on curved screens that's a point against IMO, since the screen is more vulnerable than a flat one (I've never used a screen protector at all previously).
     
  5. dontpanicbobby

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    Any curve or chamfered edge makes you more vulnerable to cracks. Case or no case. Same for screen protectors.
    I think it's Physics but I don't know the math.
     
  6. Snakeyeskm

    Snakeyeskm Android Expert
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    For other members of the forum, it's important to know that dontpanicbobby is a professor emeritus of math at a prominent college. Go figure
     
  7. dontpanicbobby

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    Part of that is actually true. I worked at a college but I was on the Staff.

    My Physics related idea was there is a point where the curve meets the flat which would be a fracture point. A totally flat surface may not have one. Hit it hard enough anywhere and a flat screen will break.

    The college was not MIT but close
    .
     
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  8. SedaKhach

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    Korean brands are good. Check out Gobukee on Amazon.
     
  9. doc1964

    doc1964 Android Enthusiast
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    Hi folks, just to add my own thoughts to this thread.
    I have owned phones, going all the way back to approx 2003 with the first one i bought being the NEC e606 from 3 that at the time was like something out of Star Trek.
    Anyway, i have renewed my phone regularly and as the screens got bigger and the phones smarter, i have always looked to protect them as best i can. Initially this was by buying wallet type cases that totally hid the phone. As the phones got better looking however, i wanted to cover them up less so moved to buying bumper type cases and screen protectors.
    Like most people, first screen protector was the film type which were difficult to install and usually ended up with bubbles obscuring the screen.
    I then discovered tempered glass and have used this type of protection for several years.
    I appreciate the points that are made about some of the disadvantages etc. to these covers, however i have found them in the main to be pretty easy to apply and with very little downsides.
    What i have appreciated is that each time i have renewed my phone, i have been able to pass my previous one to my wife in absolutely pristine condition. Not one mark on the original screen. Simply buy a new case and screen protector and the phone she gets is like brand new.
    My last update was in Dec 08 when i bought a Galaxy S8, (wife was given my old S7).
    I immediately bought a Spigen bumper case and i also bought the following screen protector by OTAO.
    https://www.amazon.co.uk/gp/product/B071W2YDTW/ref=oh_aui_detailpage_o02_s01?ie=UTF8&psc=1
    Here we are 6 months later and in all the years of using protectors, i have experienced nothing more than some key scratches etc. to the screen, this time however, I went on holiday abroad on 12th of May and on the second day, noticed that my screen had a shattered corner and crack running in a small circle at that corner, must have dropped it or something on it the previous night.
    The screen was still responsive and there was very little downgrade to visibility so i kept the screen saver on for the remainder of the holiday, all the while anxiously hoping that the screen underneath the protector would be OK.
    Anyway came back from holiday and as quickly as i could i peeled off the protector and there was no damage to the S8 OLED screen whatsoever, much to my relief as i believe it is about £200 to replace an S8 screen.
    One added bonus is that, as i was already impressed by the screen protector, i had bought a standby one in case something like this were to happen.
    I applied this new protector and in the box it contains a guarantee card stating that should your protector crack or break they will replace it free just to contact them, so i will do so but to be honest if they do this would be a bonus and if not i would buy another one anyway for future emergencies.
    Final point and total coincidence but whilst on holiday, one of the barmen in a pub we drank in had same phone and had a very similar piece of damage to that on my phone but he had no screen protector which when basically his phone was gubbed.
    Most new phones are gorgeous (also slippy) and it is a shame to cover them up in anyway but if a £10 screen protector can possibly save you from £200 repair bill then it is certainly something worth trying.
    Good luck.
     

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  10. Kevin-B

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    I am not fond of the way my inflexible screen protectors have fit the curved screen on the S8. Two from a very reputable manufacturer, two different designs trying to solve the problems of adhering a hard object to a curved surface. First one fell off within days; the replacement (different design) kinda sticks, but has gaps around the edges that are now filled with adhered dust after 9 months of use.

    Something softer and more flexible would probably work better. I'd purchase a device with a flat screen in a heartbeat if there were a phone with the characteristics I need. Flat has always worked great for me in the past; the curve is a pointless feature that is showy for a few minutes, and then a pain in the neck. In my personal, humble opinion.
     
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  11. Dave3d

    Dave3d Newbie
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    Yep, I totally agree Kevin. I absolutely HATE the curved screens. My Note 4 screen just broke, so I got an S8, and I hate the S8. Thinking about repairing the screen and giving the wife the S8. Or I am hoping to get a Razer Phone when I get the money, and pass the S8 to my wife.
    The Razer is built for gamers, and thats mostly what I do on it anyway, AND it has a flat screen, AND its not $1300 like the curved Note 8 is, and probably the same price for the Note 9.
    Only problem is is that there is rumored to be a Razer Phone 2 coming out in Sept. I hope it also has a flat screen, but if it doesnt the price should fall even more for the Razer Phone.
    https://www.amazon.com/stores/page/...C&lp_mat_key=razer phone&lp_query=razer Phone
     
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  12. doc1964

    doc1964 Android Enthusiast
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    Funnily enough i had an S7 before my current S8 and i deliberately bought the flat screen variant rather than the edge.
    As much as i love the S8, i would also have bought a flat screen version as i always use a bumper case and find the curved edge of absolutely no added value, definitely more problems than its worth.
     
  13. Kevin-B

    Kevin-B Well-Known Member
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    I agree Doc. The curved edge just gets in the way. When I hold the screen in landscape mode, the phone constantly registers extra touches from my palm or whatever. Very annoying. And I do have a case on it, which in theory should reduce the phantom touches. All in all, an example of form NOT following function.
     

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