[Xperia Z5 Compact Accessories] lagittaja:
Yeah, like NPK06 said, the tempered* glass screen protectors aren't a scam.

There's pretty much two types of screen protectors for phones. Plastic (PET film) or glass.

With a plastic one you tend to lose the slick feel of the glass and depending on the quality it could affect the clarity or colors and so on.

Plastic protectors also scratch relatively easily and the application is horrid as it's not a rigid object you're trying to lower on the phone.

Glass protectors are made from, glass, doh. Same stuff as there is on your phone. No loss in feel or clarity and so on.

Typically 0.2-0.4mm in thickness, tempered, oleophobic coating (literally "fear of oil") which resists finger prints and makes the glass easy to clean, nowadays they've got rounded edges as well. And high surface hardness (8-9H) so they're tough to scratch.

Easy application. All you need to make sure is to just line it up carefully. They adhere themselves pretty amazingly. Sometimes it starts automagically from one of edge of the protector and sometimes you need to press on the center of the glass to start the process.

Heres couple of examples

https://www.youtube.com/watch?v=nle4XIrtBRw&t=16s

https://www.youtube.com/watch?v=8H5p4d3UhEk

https://www.youtube.com/watch?v=LpJv8tO5Am4

It really is as simple as that. Clean, wipe, align, lower it down. Voila. Easy even for me with my big fingers :D

A tempered glass screen protector really is a nice thing to have. In case you drop the phone, the protector

could

take the front of the blow.

So instead of cracking the glass of your phone, only the screen protector would crack.

With my One M7, it once dropped. The phone bumped against a round metal object.

Point of impact was at the long side edge of phone at 45 degrees so not directly at/parallel to the screen or not directly at the side of the phone. The edge of the screen protector took the force of the impact, tiny section of the edge crumbled into small little not-sharp-pieces and then started a hair line fracture from the point of impact.

The glass of the phone was unaffected. That's pretty remarkable considering the glass on the M7 is from edge to edge.

I can not recommend these glass screen protectors enough! They're hell of a lot cheaper than having to repair a cracked screen!

And there are also tempered glass protectors for backs, eg. for Xperia Z phones.

StilGut is one of the brands that offers front and back tempered glass protectors for Z5 series.

You can find them from Amazon and so on, or from their home page. If you are in Europe ordering from their home page is better, the front+back protector is 19.99€ + shipping inside EU 4.5€. And apparently you can get a 5€ promo code if you sign up for their newsletter.

On Amazon it was 20$.

Disclaimer though, I have never personally used StilGut products myself, I just came aware of their products on the Z5 accessories forum by another user. Just letting you know they exist and the price point.

* Tempered (or toughened) glass basically means that the glass has gone through a thermal or chemical process to increase it's strength.

The surface of the glass is in compression and the inside of the glass is in tension. If the glass breaks, instead of splintering into jagged shards, toughened glass breaks into small granular chunks.