Database Develop

Best Screen Protector for HD2: Vikuiti (TM) DQC-160

Okay, I am going to be super honest here.
I've tried several screen protector for my HD2 since I gotten it. Possibly 7 total different ones now. Bought from ebay, HTC official, etc. They are all crap!
Today has been the day that I am settling for the best screen protector I've found - and would HIGHLY (with 100%) recommend this screen protector to anyone in a heart beat.
The Vikuiti (TM) DQC-160
http://www.protectionfilms24.com/article/vikuiti-dqc-160-screen-protector-htc-hd2-28087.html
I am from the US, I bought the protector on Sunday and I received them in the mail today, Thursday. Super fast shipping overseas!
1) Very easy to apply. Easy clean up!
2) No need to apply after a hot steamy bath. It really resists dusts during application.
3) Highly cut to precision! I love this! It also cover the entire glass in front! Even the bottom glass under the buttons!
4) The feel of it is just amazing! It feels like its not even there! I feels like I am touching glass! No friction whatsoever. *Note that I am not exaggerating here.
5) Very transparent. I can not tell its even on. And my Front sensors are not affected by this protector in any way.
I am posting pictures. See below. Ask questions away.
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thank you for sharing this information.
Maybe you could briefly outline what the advantages of a screen protector for a hd2 are. I'm not too familiar with the device yet, but i thought the display is glass. I saw videos where people tried to scratch the surface with keys and knifes but didn't succeed.
Thank you!

I'll help... just google for capacitive screen and notice, that top coat is not glass. it can be scratched, just not as easy as resistive one.

Martin Fields... awesome...

wow it looks good...
it even has that part that protects the part under the buttons unlike mine...
nice keyboard.

I should be receiving mine today!
I originally ordered some cheaper ones, which are awful! It's like you have to apply them in an air tight room, and the edges never stay stuck.
I heard good things about the mentioned protector so I ordered one.
Thanks for posting the photos and positive review!

Ordered mine as well.
Hope no dust or loose edges this time.
Thanks for the tip.

Definitely will order this, thanks

Installing ?
Hi,
I'm having some trouble installing - any hints ?
I agree though - The Vikuiti (TM) DQC-160 is by far the best screenprotecor.
Mvh Morten

Fit on flush screen?
lemonspeakers- Just wanted to know how the DQC-160 fits on the flush screen of the HD2? I was a little concerned that the 160 was a "ridgid" type of SP and thus a little thicker. I just installed a protectionfilms24 SP on my Canon A590 and was worried it may be to high for the HD2 flush screen. I will be getting my HD2 from TMobile US March 24th. Thanks

Greaaaaaaaat, thank you very much for sharing! I have been looking for a good protector for very long, but there are so much different opinions about it, but this sounds really great!
Although I have one question, it covers the " sensor " next to the " speaker " of the phone (you know when you talk with somebody and I mean the speaker of which you hear the person talking to you), and I have read somewhere on this forum, it shouldn't do that!
Could anybody confirm/disconfirm this?

Filipek88 said:
Greaaaaaaaat, thank you very much for sharing! I have been looking for a good protector for very long, but there are so much different opinions about it, but this sounds really great!
Although I have one question, it covers the " sensor " next to the " speaker " of the phone (you know when you talk with somebody and I mean the speaker of which you hear the person talking to you), and I have read somewhere on this forum, it shouldn't do that!
Could anybody confirm/disconfirm this?
Click to expand...
Click to collapse
Read my first post. This SP is highly transparent but smooth as glass. It won't interfere with the proximity and lighting sensors. Already tested under different conditions. It works as if it was never there.
I also forgot to mention, the SP is a little thick. That just goes to show that this is not some cheap material they are using- mind you.
rawhide85 said:
lemonspeakers- Just wanted to know how the DQC-160 fits on the flush screen of the HD2? I was a little concerned that the 160 was a "ridgid" type of SP and thus a little thicker. I just installed a protectionfilms24 SP on my Canon A590 and was worried it may be to high for the HD2 flush screen. I will be getting my HD2 from TMobile US March 24th. Thanks
Click to expand...
Click to collapse
Again, read first post. This was highly cut to precision. The only hard part I had was getting the bottom and sides to line up perfectly (I am a bit anal) because its highly precised cut. *You don't want your screen protector running off the side of your device now do you?

i just ordered mine not too long ago, for the North Americans like me its around $12.00 USD.
so as of now im just patiently waiting for the screen protector to come in. i will try to post up a video on youtube regarding said protector, most likely it will be posted in this thread after i made the video. till then.. Adios!!

Got mine today. Soooo much better than the cheap ones you buy on eBay
I have a doubt: can you take it off, wash it an put it back on again, or is it a one time application?
Thanks

I have the opportunity to get this for "free."
How is it WRT:
1. Fingerprints and skin oil smudges
2. Sunlight and glare

If it came with a rear camera protector as well, like my Martin Fields kit for the n95, I would buy it.
For now, I'll stick with the screen protector that came with my maximum protection invisible shield.

freshabp said:
If it came with a rear camera protector as well, like my Martin Fields kit for the n95, I would buy it.
For now, I'll stick with the screen protector that came with my maximum protection invisible shield.
Click to expand...
Click to collapse
Ugh. I got that Inv. Shield and it totally ruin the glass feel. and that invi. shield. is full of friction that it no longer is a touch device. UGH! I got over it!

friend'scatdied said:
I have the opportunity to get this for "free."
How is it WRT:
1. Fingerprints and skin oil smudges
2. Sunlight and glare
Click to expand...
Click to collapse
I agree, it can give you lots and lots of fingerprint oil. much more than the glass alone.
Are there any FULLLLLL screen protector that solves this issue?

fockewul said:
Got mine today. Soooo much better than the cheap ones you buy on eBay
I have a doubt: can you take it off, wash it an put it back on again, or is it a one time application?
Thanks
Click to expand...
Click to collapse
Yes you can reapply. I've done it and it works. Just make sure to air dry it b4 you put it back on.

I would h ave to agree with you. I got the invisible shield thinking it was the best possible product and in ways it is great. It does not seem as if the edges will start to come up and I think it provides preimum protection but it does ruin the feel of the device plus I had a terrible time applying it since it was my first time using this product on a device. Once it tried I have some horrible streaks underneath and I am afraid to pull it up and try again. So I might give this one a shot.

Beware - WEAK Gorilla Glass! Scratches out of nowhere

I had my Nexus 4 wrapped in plastic pretty much all day yesterday. Only in the evening I had taken it off. It had no contact with anything that might cause the scratches. This morning I found it had 3 nasty scratches on the screen. How that is possible - I have no idea. The phone was not dropped nor abused!

Maybe the phone you got was in a bad batch, I doubt it's covered by warranty.

So the Gorilla Glass is weak because you have no idea what happened?

Scratches are not caused by thin air friction like you seem to imply. Pocket with keys or change, something that shouldn't have grinded on it did. Please tell us something more convincing than "it was sitting there with the plastic on".
Its gorilla glass 2.. the exact same thing as about 50% of the phones on the market and your is scratched by air?

Thoughtful said:
So the Gorilla Glass is weak because you have no idea what happened?
Click to expand...
Click to collapse
MatAuc12 said:
Scratches are not caused by thin air friction like you seem to imply. Pocket with keys or change, something that shouldn't have grinded on it did. Please tell us something more convincing than "it was sitting there with the plastic on".
Its gorilla glass 2.. the exact same thing as about 50% of the phones on the market and your is scratched by air?
Click to expand...
Click to collapse
No pockets with change, had it empty specifically, plus had plastic wrap at all times. At home I had it charging either on the wooden table or the chair - Wood scratched the class?
The phone was face-down on both.
Trust me, I'm shocked...

MatAuc12 said:
Scratches are not caused by thin air friction like you seem to imply. Pocket with keys or change, something that shouldn't have grinded on it did. Please tell us something more convincing than "it was sitting there with the plastic on".
Its gorilla glass 2.. the exact same thing as about 50% of the phones on the market and your is scratched by air?
Click to expand...
Click to collapse
Pretty much nailed it, it's like when my dad tells me "fish screensaver" installed itself on his computer rofl.

Sabotage from someone.

Time for a screen protector then. They can do a decent job of concealing scratches for you.

AntonJart said:
No pockets with change, had it empty specifically, plus had plastic wrap at all times. At home I had it charging either on the wooden table or the chair - Wood scratched the class?
The phone was face-down on both.
Trust me, I'm shocked...
Click to expand...
Click to collapse
It had the original plastic on or you had it wrapped in some sort of plastic?

Some pics would be appreciated...

TheFiveDots said:
It had the original plastic on or you had it wrapped in some sort of plastic?
Click to expand...
Click to collapse
I had it in original plastic, I was hoping screen protector of ebay would be in today...

Some pics would be good. that way we can try to help you figure out if it was maybe a rogue bear or Beaver. Or maybe ghosts. Most ppl fail to realize how scratchy ghosts are. At any rate, I digress, post some pics. I am an honorary Chipoqua Scout from 18 years ago, I might be able to tell.
:laugh:

AntonJart said:
I had my Nexus 4 wrapped in plastic pretty much all day yesterday. Only in the evening I had taken it off. It had no contact with anything that might cause the scratches. This morning I found it had 3 nasty scratches on the screen. How that is possible - I have no idea. The phone was not dropped nor abused!
Click to expand...
Click to collapse
Obviously something went wrong, it's like a person complaining about armour plating when they got hit at point blank range.
Motorola Atrix (AOKP JB)
Nexus 7 (Stock+ Root)
Desire HD ~ overheating rebooting.
N900 ~ usb broken off.

AntonJart said:
I had my Nexus 4 wrapped in plastic pretty much all day yesterday. Only in the evening I had taken it off. It had no contact with anything that might cause the scratches. This morning I found it had 3 nasty scratches on the screen. How that is possible - I have no idea. The phone was not dropped nor abused!
Click to expand...
Click to collapse
I blame sleepwalking.

We all know its not scratch proof.
Sent from my GT-I9100 using xda premium

Angry cat maybe? Are you ignoring your pets due to playing on your phone?

Tiny grains of sand can easily scratch gorilla glass. Easier than keys or coins.

They are not visible unless I use flash. Right bottom corner, two are in X shape and one near the edge.
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Maybe it's your good looks. Be lucky it didn't shatter. In the future, take more care of it. I've owned nearly a dozen devices and have never had problems except for the time I let a friend use the stylus on the phone and pressed way too hard.

mi7chy said:
Maybe it's your good looks. Be lucky it didn't shatter. In the future, take more care of it. I've owned nearly a dozen devices and have never had problems except for the time I let a friend use the stylus on the phone and pressed way too hard.
Click to expand...
Click to collapse
I've owned a lot of devices myself, never had a single scratch on them. This is the first time, I cant even think of what have I done to this phone to get scratches like that.

Shame on ifixit!

ifixit undoubtedly has the best teardown guides, but when they said that the nexus 5 front panel is a "fused flustercluck" that really bugged me.
To be honest i think their style has changed from when they first started, now the teardown guides seem to make a few too many jokes and links to irrelevant stuff. I'm not a huge fan of this, but I'm holding that against them as everyone has their own style.
But saying that the N5 front panle is a fused flustercluck just bugged me when they are perfectly happy to try melting the glue on the ipads and ipod touches to get into them, but not try that on the nexus 5. They even specifically sell the "iOpener" (basically an overpriced microwave heatable beanbag thingy) for situations like this. Not trying is what annoyed me.
So I set out to try myself!
I bought a whole front panel assembly with screen.
Now i don't have one of their heated beanbags so i just stuck the whole thing in the oven at a low temperature. 40C pretty much did nothing (as expected) so then i set it at 70C and heated the whole thing until it was toasty (15 mins).
Using a suction cup on the glass did nothing, then i noticed that I could see the back of the screen through the slits which the rear cover clips onto. So i started pushing at it with a plastic spudger, (the ifixit one fits perfectly).
I saw that that glass was coming away from the case, and careful pushing gave me a big enough gap to slip a guitar pick in. pushing at the other slits and running the guitar pick around the screen came off relatively easily.
One thing about the gorilla glass 3, it was pretty flexible, i was seriously concerned that i was going to crack the glass! it seemed to flex more than the sgp glass protectors i used before.
The glue is only around the edge of the screen which made it easier, I was worried that the whole back of the screen would be glued as well, but its just a foam pad.
Popped the back off my nexus 5 and attached the ribbon cable for the now separated screen just to make sure its all working and it is!
So here we are, the front panel is not a "fused flustercluck" as ifixit says, but can be easily separated. Even easier if the screen is damaged so you don't need to worry about keeping the screen in one piece.
ifixit gave the nexus 5 a negative point on this:
The glass and LCD are fused to the display frame. Fixing broken glass will be either expensive or very difficult.
But in all honesty, since the difference for just the glass and screen and the whole front panel (including the screen) is so small, it makes no sense to take the hassle of replacing just the screen, and also since most failures are going to be physical damage resulting from dropping the bezel will likely be damaged too, and just makes more sense to replace the whole thing.
pics for you all to enjoy:
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Dude! Why? Can you please send me some of the cash you've got lying around?
sent from my hammerhead

Damn that looks really cool. Thanks for the information, it's actually very useful.

Pictures are down for me at this time.
But kudos for the effort. Maybe ifixit should see this and revise their teardown.

ldubs said:
Dude! Why? Can you please send me some of the cash you've got lying around?
sent from my hammerhead
Click to expand...
Click to collapse
LOL
I am actually doing a custom mod on the nexus 5 which requires the screen and front assembly/bezel to be separate.
I managed to find the screen only without the front assembly/bezel but not just the assembly/bezel itself so I went this route of separating it myself.
squeeish said:
Pictures are down for me at this time.
But kudos for the effort. Maybe ifixit should see this and revise their teardown.
Click to expand...
Click to collapse
I have updated the links for the photos now, hopefully this site is more reliable!
I wouldn't mind if someone linked this page to ifixit.

The pics with the detached screen still working are priceless.

electric0ant said:
LOL
I am actually doing a custom mod on the nexus 5 which requires the screen and front assembly/bezel to be separate.
I managed to find the screen only without the front assembly/bezel but not just the assembly/bezel itself so I went this route of separating it myself.
Click to expand...
Click to collapse
When you finish modification share with us the result.

electric0ant said:
LOL
I am actually doing a custom mod on the nexus 5 which requires the screen and front assembly/bezel to be separate.
I managed to find the screen only without the front assembly/bezel but not just the assembly/bezel itself so I went this route of separating it myself.
I have updated the links for the photos now, hopefully this site is more reliable!
I wouldn't mind if someone linked this page to ifixit.
Click to expand...
Click to collapse
Wait...what mod?:what:

davwman said:
Wait...what mod?:what:
Click to expand...
Click to collapse
+1
What is this custom mod that you speak of?
Sent from my Nexus 5 using Tapatalk

All I can say is that it's quite an ambitious mod (for me anyway).
I will definitely let you guys know once I complete it, but it all depended on me being able to separate the screen from the bezel and that worked, so all lights are green!
I just need to source equipment and parts, but with the holidays coming up It likely won;t be until mid-late jan until I will finish this.

LETV Le1 PRO (X800) broken screen replacement

I have LETV X800 US version. Drop from 1.5 cracked the glass really nice (see attachment). I am thinking to order screen replacement from here: http://www.vopmart.com/pa1013251.html or here: http://s.aliexpress.com/iemyi2Yz
Do you think it is compatible with my US version of the phone.
I guess it should work on both CN & US but I need to ask before ordering.
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Here are some Chinese replacement videos (I will definitely make one also when I receive the part):
http://v.youku.com/v_show/id_XMTMyNjY1MjY4OA==.html?from=y1.2-1-105.3.1-2.1-1-1-0-0
http://v.youku.com/v_show/id_XMTMzMDM2NzEwOA==.html
http://v.youku.com/v_show/id_XMTMzMDM2NzEwOA==.html?from=s1.8-1-1.2
http://v.ku6.com/show/xxsPqDFQRIrHZl-0sZy8Ww...html?from=my

Any progress?

I also have the same problem.
Hi
Did you find a solution to your problem ? I also have the same and I do not find the necessary help.
Thank you for your answer

In my reading the screen replacement should work on both US and CN versions....

The screen of this phone is subpar to current phone standards. Mine cracked when dropped at 30 cm from tiled floor after 3 months of use! The phone was house into its original silicone transparent protection, with a glass protection on top! The glass protection didn't brake, only the screen underneath did. I had it replaced for the equivalent of 30 euros in China in a general phone fixing shop, and made clear I did not want an original replacement. They guy came up with a good quality screen, slightly thicker than the original. I have used it without problems for 8 months now. It withstood about 4 falls from 1 meter each, but I keep the phone housed in a metal frame protection since then. The original case is bad since it doesn't protect the phone all around as it should.

I bought the screen from vopmart.
Price is ok, delivery was fast (less than a week to Germany).
Disassembly of screen was actually easier than in the videos, works pretty well.
The BIG problem was (which I did not really realize or ignore until then)...the vopmart screen replacement did NOT come with the adhesive to glue the screen to the phone.
Since I was impatient and wanted to use the phone right away, I used some own tape and glue and damaged the screen in the process.
Bottom line:
- Screen replacement is relatively simple and screen is not too expensive
- make sure you double check that the adhesive is included in the screen you order or order separately, otherwise you will not be able to replace the screen
- I second what the previous poster said....my phone fell from about 70cm and the screen was cracked pretty badly, previous phones did survive this
I bought a Xiaomi phone now. I hope/think build quality is a bit better and, more importantly, you are not stuck with Android 5...

I'm planning to order screen on Aliexpress. I want to ask you that, is your screen's colors or quality worse than original? I'm not asking for durability, just asking for quality.

Jiroskop said:
I'm planning to order screen on Aliexpress. I want to ask you that, is your screen's colors or quality worse than original? I'm not asking for durability, just asking for quality.
Click to expand...
Click to collapse
I think it is about the same as the original. I am not 100% sure though since I destroyed it a little during the replacement. And I believe the color quality from the original one is not great to start with anyway.

nuukee said:
I think it is about the same as the original. I am not 100% sure though since I destroyed it a little during the replacement. And I believe the color quality from the original one is not great to start with anyway.
Click to expand...
Click to collapse
Thank you. I will check adhesive before order.
I saw some feedbacks about pressure marks, it's like
Do you have screen problem's like this?

Jiroskop said:
Do you have screen problem's like this?
Click to expand...
Click to collapse
No, this is ok with my screen.

Did anyone replace the digitiser and screen in one go and need glue for the job? Which type?

KarlDroid said:
Did anyone replace the digitiser and screen in one go and need glue for the job? Which type?
Click to expand...
Click to collapse
I didn't replace yet but searched on internet and found this:
https://tr.aliexpress.com/item/3pcs..._8&btsid=806ce06b-93bc-4eff-ada1-1fff3ee50057

Jiroskop said:
I didn't replace yet but searched on internet and found this:
https://tr.aliexpress.com/item/3pcs..._8&btsid=806ce06b-93bc-4eff-ada1-1fff3ee50057
Click to expand...
Click to collapse
I ordered the screen which comes with the digitiser and lcd screen but no sticker so I ordered the sticker, however some people in this thread said glue, so I am confused. What more the replacement videos don't show people putting in glue.
And originally did the phone have a sticker I think not?

KarlDroid said:
I ordered the screen which comes with the digitiser and lcd screen but no sticker so I ordered the sticker, however some people in this thread said glue, so I am confused. What more the replacement videos don't show people putting in glue.
And originally did the phone have a sticker I think not?
Click to expand...
Click to collapse
I don't know but probably phone have sticker originally, not glue or something like that.

Yes I meant this sticker.
Mine did come without so I had problems.

Replacement of screen
nuukee said:
Yes I meant this sticker.
Mine did come without so I had problems.
Click to expand...
Click to collapse
So I have ordered both and have the heat gun, and the pry tools, so technically if I am not a gimp I should be able to complete this successfully.
I am just again slightly confused because some videos recommend removing the back cover and the getting to the front by doing a full disassembly whilst others recommend removing the glass directly.
Has anyone tried both methods? I would understand if you were replacing the battery also but...
Thank you in advance.

I have only tried the "front" method, so just removed the glass from the front. I found this to be pretty easy. I did this with a Sony Xperia phone before and I must say the letv was much easier.
I can recommend removing the glass from the front.

Which one is the front method? What and where did you buy to repair it?

user2988 said:
Which one is the front method? What and where did you buy to repair it?
Click to expand...
Click to collapse
I think you use a heat gun to warm it up and then use a suction cup to loosen it then use a razor blade to cut away the glue/sticker and slowly pry it apart.
Then you detach it, attach the new one apply the sticker and then reseal.

Sticker
Hello everybody,
The son of my friend break his screen (LeTV one Pro = LeEco x800 Pro).
He bought a replacement screen, but there is no sticker to fix the screen. It's hard to find this part alone.
Can you give me an idea to solve this problem?
Regards.

[Q] Broken back glass : manufacturing problem or bad luck ?

Dear XDA users,
I bought my Mi 9 early April and after less than a month I have found the back glass broken like this when taking the phone out of my jeans pocket :
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The phone never fell (it has absolutely no marks on the outer metal), I did not perform any special/unusual move with the phone in my pocket, and there was no other items in that pocket (I am used to carry all my phones that way for years).
But this time I just found the mobile like that when I took it out. Note that I am not using any kind of protection.
So I wonder if I just had extreme bad luck or if more devices may have a fragility on their back glass ?

Maybe there was some keys or coins in you pocket and sitting with jeans make some pressure on phones

emprazol said:
Maybe there was some keys or coins in you pocket and sitting with jeans make some pressure on phones
Click to expand...
Click to collapse
No as I wrote above there was nothing else in my pocket. I am used to live and travel with all my phones like that for a dozen years, and I never put anything else in the same pocket to avoid damaging the screen. It worked fine until now...

I wonder if it accidentally got hit or something, I know you said no but it looks like that section near the usbc port is took a hit of some sort.
I had my oneplus back crack, only a few weeks old, never dropped etc but I chalked it up to it must have inadvertently got hit somehow/someway without be knowing as I didn't find others with the same issue.

Ducter said:
I wonder if it accidentally got hit or something, I know you said no but it looks like that section near the usbc port is took a hit of some sort.
Click to expand...
Click to collapse
The cracks in the glass seem to start from the bottom indeed, but I can assure you that the metal all around the usbc is totally clean (there is a small white reflection there on the picture which may be seen as a damage, but it's not).
I cannot exclude that I missed a "hit" on my pocket during the hour which elapsed since the previous phone usage, but it would still be extremely weak for a gorilla glass 5 to break with a "hit" that I wouldn't have felt or noticed :/

kalhimeo said:
The cracks in the glass seem to start from the bottom indeed, but I can assure you that the metal all around the usbc is totally clean (there is a small white reflection there on the picture which may be seen as a damage, but it's not).
I cannot exclude that I missed a "hit" on my pocket during the hour which elapsed since the previous phone usage, but it would still be extremely weak for a gorilla glass 5 to break with a "hit" that I wouldn't have felt or noticed :/
Click to expand...
Click to collapse
Just looking around, can order a new back glass for $10 and it looks simple to replace. That's good at least.
Back removal
https://youtu.be/Pj-6LN53RbE
Replacement back here

It's 3D glass. NEVER leave it unprotected.
2.5D glass on iPhones are much weaker as well (like the front of the Mi 9 which is very close).
3D glass or Edge-Glass (think Samsung Galaxy S7/8/9/10) is also amongst the worst.
No one should go without, AT LEAST, the included case, just because the camera glass isn't sapphire-crystal (9H) but sapphire-glass (5.5H) - like JerryRigEverything test has shown.

Ducter said:
Just looking around, can order a new back glass for $10 and it looks simple to replace. That's good at least.
Back removal
https://youtu.be/Pj-6LN53RbE
Replacement back here
Click to expand...
Click to collapse
Thank you very much for the links. I don't have the tool to heat the back but I may try to get it done in a repair shop.
RedWave31 said:
It's 3D glass. NEVER leave it unprotected.
2.5D glass on iPhones are much weaker as well (like the front of the Mi 9 which is very close).
3D glass or Edge-Glass (think Samsung Galaxy S7/8/9/10) is also amongst the worst.
No one should go without, AT LEAST, the included case, just because the camera glass isn't sapphire-crystal (9H) but sapphire-glass (5.5H) - like JerryRigEverything test has shown.
Click to expand...
Click to collapse
I had a Galaxy S7 before the Mi 9, two years in my pocket exactly the same way with no protections, never had a scratch on the screen or back

Same issue repeated with the rear glass on Mi9
My phone is in a robust case and the rear glass has been broken 3 times now! I have never broken any screen before and I have had phones for over 25 years.

Hi,
I just realize that I forgot to provide feedback here.
So I bought this back cover on Aliexpress : https://www.aliexpress.com/item/33009357325.html
An this heat gun : https://www.aliexpress.com/item/32966891985.html
I replaced the back cover myself and it was quite easy. Have a look at video like this one before : https://www.youtube.com/watch?v=Ta_vYqOfK0Q
Since then, I am enjoying my Mi 9 and never had any problem with broken back or front glass anymore (although I still don't use any cover and hold the phone in my pocket...).
I think that the original back cover that I had was faulty, although Xiaomi never accepted that and refused to repair under warranty.
Good luck with yours !
Laurent

Thanks I will give it a try.
I have purchased all of the replacement screens do far from eBay..

Looks like bad luck. I don't use a case on my Mi 9 with no issues. The back is all scratched up, but no cracks.