yashsingh1/xdaforums huggingface dataset:
[Nexus 4 Q&A, Help & Troubleshooting] RavenII:
Take 2: I'll try to play nice....Usually I would have just deleted the thread....however, I'm trying to change....so....I'll take the time to dumb this down for those who aren't quick enough to follow. Open wide, here comes the spoon feeding!

What:

I'm trying to find if there's any interest in getting a (cheap <$10) replacement for the glass back of the N4. Right now...it's just an idea. There might not actually be anything that's thin enough to be used as an alternative. However...it might be possible.

Why:

Why not?...but seriously...once the glass back shatters, it's unsightly for one. It (in my case) doesn't leave a decent enough surface for a DBrands skin (mine looks lumpy as **** because of the bits of glass). And it leads to other possibilities...for example, you can get a clear acrylic/polycarb piece and etch it? Color it? What ever you want to do to make it yours...

How:

I'm not fully sure yet, I know there's a few companies that will cut acrylic however you want, they charge per sheet, and per cut...if a cut/corner is rounded they charge per corner/rounding, etc...so that's all going to have to be worked out. Also, there is differences between the types of attenuation of different materials...for example after I put Poly Carb in the title...I found it has worse effects on RF than Acrylic/Plexi. Along with that, there are downsides of each alternative...some are more impact resistant but easier to scratch....some the opposite.

Please don't come into this thread and post about how it's not possible, how it can't be done, how it's a dumb idea because of one reason or another. It's in fact...POSSIBLE, it CAN be done, and it's NOT a dumb idea...(according to the poll and the post on Reddit anyhow). I've been dealing with these devices for almost 2 decades...I know what I'm talking about when it comes to this sort of thing.

Now, for those who will start crying about how there's antennas and NFC and "other stuff" attached to the back...refer to the last sentence of the previous paragraph....THEN look at the pictures below, the first of which shows there is NOTHING other than the NFC antenna.....which picture 2 shows is removable from the glass....Thanks for reading...if you even got this far...

Edit: That's actually not the NFC antenna, it's actually the charging coil.

Credit goes to Fencesitter for the above image
[Nexus 4 Q&A, Help & Troubleshooting] ApriliaM3:
Ok let's start again shall we... OP, you can edit your original post with the extra details from your follow-up post (minus the colorful adjectives).
[Nexus 4 Q&A, Help & Troubleshooting] RavenII:
Bump
[Nexus 4 Q&A, Help & Troubleshooting] Cor-master:
I've thought about this and yes, I'm interested. Ideally polycarbonate with soft touch rubber coating like the one x+ and droid dna.
[Nexus 4 Q&A, Help & Troubleshooting] scream4cheese:
If it's just 10 bucks, I'm down for one!
[Nexus 4 Q&A, Help & Troubleshooting] zaptac:
Go for it. It's a good idea.

Send by me.
[Nexus 4 Q&A, Help & Troubleshooting] jsatya:
Without a doubt. AS LONG AS... Incredibly detailed instructions are included with the purchase as far as how to separate the phone... Although I guess anyone can go to iFixIt or something... But it would also have to retain NFC and wireless charging...

+1 on the soft touch BTW...
[Nexus 4 Q&A, Help & Troubleshooting] QUIETLYloud:
as we start shattering the back glass this ideal will no longer be thought of as anything but the greatest... go for it!

just wondering, will it effect the wireless charging?
[Nexus 4 Q&A, Help & Troubleshooting] RavenII:
That's a great question...though I can't imagine it actually affecting it, I'd have to test it (if this thing ever goes forward)...

Edit: according to this site it's less dense therefore less obstructive.
[Nexus 4 Q&A, Help & Troubleshooting] RavenII:
Alright, so I've got a place here in Chicago that does this sort of thing, it's just the matter of finding out if they can make the cuts for the speaker...and I'm unsure if the LED lens is a part of the back glass or not....
[Nexus 4 Q&A, Help & Troubleshooting] Cor-master:
Gonna need a cover for the camera built in too
[Nexus 4 Q&A, Help & Troubleshooting] RueTheDay:
That's actually the NFC antenna AND the wireless charging coil (NFC antenna is the outer coil, charging is the inner coil).

No one said in the other thread that they couldn't be separated, it's that the antenna, coil, connectors, plastic housing, camera cover, etc. are all glued to the glass. Separating them for a tear down article is one thing, separating them to later reglue them to a polycarbonate cover is quite another. It's not impossible, but it's a lot more work than most people are going to be willing to do (unless they've already broken the glass and their only other choice is a $$$ replacement).
[Nexus 4 Q&A, Help & Troubleshooting] dcrandon:
As an optometrist, I'm curious about something....

Polycarbonate would be a great material for impact/breakage resistance, nothing better actually.

But, non-scratch resistant coated polycarbonate will scratch almost with a fingernail. Is it easy to get scratch resistant coated poly for this type of stuff?
[Nexus 4 Q&A, Help & Troubleshooting] republicano:
would you just glue it on? or how would it be applied and yet friendly with the antennas in the back, gsm,wifi etc. i would like a rubber backing so i can be rough on it and something that will absorb the heat more
[Nexus 4 Q&A, Help & Troubleshooting] Fencesitter:
FYI- I just measured the glass and it looks like it's 0.5mm thick.

Removal of the glass isn't too hard, even though it has adhesive all over it (on second thought, maybe it's just around the perimeter and in patches in the middle).

As I had mentioned before, the thing to be careful about is removing the copper shielding from over the NFC+Qi coils. The copper tape is really thin so it tears easily, and if you do get it off, it'll curl up and stick to itself (luckily though, it's usually not and adhesive-to-adhesive stick, so it's possible to unroll it). I've been able to get a couple of removals and reapplications out of both the copper tape and the coils, but the adhesive on the coils is wearing off, so I probably won't be able to do remove and reapply (using the same adhesive) many more times.

Removing the glass from that point is relatively easy, done by pushing out on the glass through the speaker and coil holes in the plastic housing. The problem is that the adhesive around the perimeter sticks better to the plastic case, and cleanup is a bit of a pain.

The adhesive actually sticks pretty well to the paint on the back of the glass, however, the problem is that the paint isn't so good sticking to the glass, so on the back plastic, there will be a ring of adhesive with paint on it and the glass will have a relatively bare spot around its perimeter, say maybe 1mm wide. But I guess that's not that big of a deal if you're just planning on replacing the back glass.

With the LED lens separate from the back glass, adhered to the plastic case, you don't have to worry about removing that.

Certainly, if my back glass breaks, I'll be replacing it with plastic. I'd probably use PETG instead of polycarbonate since PC is harder to lasercut and yellows along the cut, though for 0.5mm thickness, it might not be that bad, and you could always CNC mill the PC instead. Finally, I'm not sure if may places will laser cut PC. Acrylic might be nice- it's really easy to laser cut and relatively scratch resistant, but I'm not too sure how easy it is to find in that thickness.

As I see it, you'll want not only a polycarbonate/plastic back, but also the adhesive around the perimeter and possibly some patches of adhesive in the middle. The polycarbonate will probably need to be die cut or something, but you can get the adhesive lasercut. Certainly factor that into the replacement kit BOM (Bill Of Materials) and also price.

If I were to assemble it- and what I did for my glass back- is/was to cut the adhesive large, apply it to the glass, then use scissors or a craft knife (X-acto) to cut the excess adhesive from around the perimeter of the glass, then apply the glass to the back housing. After that, then you can reapply the NFC+Qi coils, the camera gasket and put the speaker grille into place. You can probably get the adhesive preapplied to the plastic, however, that increases costs.

edit: maybe acrylic isn't that scratch resistant.
[Nexus 4 Q&A, Help & Troubleshooting] wendellc:
Yes do this!
[Nexus 4 Q&A, Help & Troubleshooting] RavenII:
Now THAT is a response. That's what I was looking for. Thanks a LOT!

Now as far as what I've found out about potential materials:

Acrylic has the...better? combination of factors (surface hardness, durability, and RF attenuation) that make it the most suitable however, if the glass is indeed .5 mm thick, it's not the best of options...since most places I've reached out to only have/go down to 1/32" or 0.7938 mm.

PC we all know is the best as far as durability however with that...the surface hardness is not ideal unless it's going to have a skin on it to begin with...Oh and RF attenuation is definitely higher than with acrylic/plexi...

PETG I never knew about to be honest (this started out as an idea) but from the little that I did read into...It's similar to PC it seems to me...though I literally spent all of 3 minutes trying to find out about it...

This site has some great info related to attenuation which, with me being a HAM, actually matters. Knowing how ****ty the design of the mobile device antenna is from the get go (due to obvious limitations)...

Edit: After reaching out to a few fellow hams, the RF attenuation isn't even something to worry about at our frequencies...The loss (if it's even measurable) would be so low that it's not even worth considering.
[Nexus 4 Q&A, Help & Troubleshooting] jphilippon:
Very very interested in this. Though my back is protected in an Acase dual layer, I don't rule out one day tragedy striking as is seemingly common with our device.

Sent from my Nexus 7
[Nexus 4 Q&A, Help & Troubleshooting] looppingz:
My back glass is broken and so is my digitizer... Be carefull that phone is hell more complicated and expensive to fix than my old desire.

Anyway I ordered the front assembly for $90 (with frame). For the back, I will first use a cover. Then I will look at alternative, but replacing glass with glass no way, it would break again. It was looking good though, before it broke.
[Galaxy S III Q&A, Help & Troubleshooting] angry_machine:
Hi...

I just softkilled my phone by trying to downgrade to an older firmware I9300XXDLJ2_I9300XEFDLJ2_XEF stock by trying to flash via ODIN.

It gets stuck in the middle of the Road of the Flashing process on odin,I just realised that it is the new bootloader issue?

I was on Ultimate Rom..My bootloader is fine but can anyone link me a torrent to a newer Firmware(STOCK)?My internet connection is not very good enough to download via a single link. Waiting for your reply...
[Galaxy S III Q&A, Help & Troubleshooting] JJEgan:
Use Google if you want to find a firmware torrent .

jje
[Galaxy S III Q&A, Help & Troubleshooting] spamtrash:
1. Follow above advice, use STOCK rom

2. if this will NOT help, use the ressurection firmware

The last option will WIPE your phone, so be wise.
[MDA, XDA, 1010 Software Upgrading] kane14:
Did anyone hear anything about Att offering the wm2003 upgrade??
[Galaxy S II Q&A, Help & Troubleshooting] megosu:
Hello all,

my battery doesn't last as it used to and after checking, I can see even during the night, in flight mode, it is still losing around 20% per night.

I have GPS, WIFI, GSM off, I use Power Saving mode. I have no app installed.

It all started 3 weeks ago, I took my phone and it was surprisingly empty. Since then, my battery is crap.

Note that if I use the phone I can have more than 4 hours of screen time, but leaving the phone alone is killing the battery pretty quickly.

so far, these are all the steps I have tried without making any difference:

I have bought 2 new batteries

I have moved from stock 4.0.4 to Alliance rom 4.1.2

I have installed Jellybam 7.1 (4.2.2) without installing any app after flash

I have removed my SD card

I have disabled media scanner

I have calibrated my battery

I have reset the fuel gauge

I have flashed different kernel

I have monitored the battery usage with Better Battery Stats (dump attached in this post), and I can't see anything wrong (99.2% deep sleep)

--------------------------------------------------------------------------------------

I don't know what to do else... and I'm starting to wonder if it could be a hardware issue with the phone itself...

if you have any idea, I'm all ready to listen and try them.

If you have the exact same issue, please join this thread and post your S2 model, hardware version and steps you have tried.

If you are in the same case, did you have this issue happening suddenly ?

mine:

S2 GT-I9100

HARDWARE: smdk4210

also if you have a s2 and can comment of your battery stats during night in flight mode, it would be great so we can compare.

Thank you

------------------------------------

Added on 6th April

Thanks pi-xel:

Some new observations,

I might have found something else, this led me to do the following experiment:

- Disable radio (airplane mode)

- Enable radio with data (WiFi disabled," 2G only" on)

- Turn screen off immediately after enabling

- Put phone *really* close to your ear as if making a call

What I experienced then were some very quiet, but still existent, clicking sounds coming out of the speaker that you might know from holding a phone close to a speaker when receiving a call or short message. I don't know whether this is regular behavior, but I would assume that the speaker should be turned off when not in use.

As I am not sure whether it should be like this, I would kindly ask users with and without our battery problem to reproduce the steps of my experiment and report their experience.

Thanks in advance!
[Galaxy S II Q&A, Help & Troubleshooting] Karpfenhai:
Re: Battery drain in flight mode around 3%/hour

Just for the prove of it, go back to your ics backup for a day...

Use speedmod kernel on both,(assuming stock Rom).

It's not hardware..

Tapatalked from my Galaxy SII
[Galaxy S II Q&A, Help & Troubleshooting] megosu:
Hi,

I had the issue with stock 4.0.4, this is mainly why I tried other ROMs.

I had stock 4.0.4 since around last summer, but the battery issue started 3 weeks ago, and still occurs even on a newly flashed ROM without anything installed.
[Galaxy S II Q&A, Help & Troubleshooting] Karpfenhai:
Re: Battery drain in flight mode around 3%/hour

Okay,I see, since you are on Stock, try the speedmod kernel.

Bbs shows your phone sleeps like a baby, my s2 consumes almost nothing in flightmode, even on android 4.2.2, I wonder if a dmesg could point to something..

Can you rule out the battery?

Tapatalked from my Galaxy SII
[Galaxy S II Q&A, Help & Troubleshooting] megosu:
Hi,

thanks for helping,

I'm not anymore on stock 4.0.4, I'm currently trying my luck on Jellybam 4.2.2.

and like I said, I tried also on Alliance rom (so again, a different kernel) but same issue.

I think the battery can be ruled out as I bought 2 new batteries and it is still the same.
[Galaxy S II Q&A, Help & Troubleshooting] pi-xel:
I'm having similar issues with the following setup:

Device: GT-i9100 (SGS2)

Rom: Rootbox Nightly 23.03. (Android 4.2.2, tried several 4.1.2 and 4.2.2 stock and CM/AOKP based roms)

Kernel: Dorimanx 9.12 (tried several dori + siyah + stock kernels)

Modem: XXLS8 (tried a whole bunch of different modems)

Battery: brand new original Samsung 2000mAh (tried 2 different 1600mAh stock batteries as well)

Carrier: Lebara over KPN Netherlands and O2 Germany

With all combinations I experience ~3%/h battery drainage, even in airplane mode. In airplane mode, my deep sleep ratio is around 98-99% as well.

However, it seems that removing my SD card led to some improvement in the drainage (not perfect, though). If you don't see any improvement by doing the same, maybe the issue is related to some files being stored on internal and/or external SD card (could it be that some wakelocks / processes related to media scanner service are simply not reported correctly in recent Android versions?). Did you try formatting both?

Besides, I see a high percentage of the battery wasted on phone radio (in Android battery monitor and in GSAM battery mon, that led me to try out many different modems - with no improvement). When I switch on airplane mode, this entry disappears but the overall drainage remains. Could it be that all the drainage that cannot be explicitly related to some process / part of the phone is collected in "phone radio"?
[Galaxy S II Q&A, Help & Troubleshooting] megosu:
the SD is a good point, I'm ready to install the ROM again if I know how to delete all the files on the phone.

I did a wipe data, cache et dalvik cache before installing, but it is true I still have some files lying around...
[Galaxy S II Q&A, Help & Troubleshooting] pi-xel:
You can format internal and external storage from CWM recovery (I would also backup all files to PC before doing this). Unfortunately, I currently need a navigation app on my phone on a daily basis, that has all the map files on my internal storage. Hence I cannot test it myself. But I'm looking forward to your evaluation :)
[Galaxy S II Q&A, Help & Troubleshooting] megosu:
I'm going to remove my SD first before doing something I could regret :)

Do I need to reinstall the ROM after formating the internal storage ?
[Galaxy S II Q&A, Help & Troubleshooting] pi-xel:
If the problem is really related to some files on internal or external storage, my guess is that you don't have to reinstall your rom. I would suggest to try removing external SD first, if this does not help, format internal storage, and if this does not help as well, then we should consider to do a clean install with empty internal and no external storage.
[Galaxy S II Q&A, Help & Troubleshooting] megosu:
ok I did it... full wipe of everything.

My internal storage is completely empty, 11.48GB available out of 11.49.

I have removed the SD too et I have installed only BBS... tomorrow morning, we will see how many % are gone...
[Galaxy S II Q&A, Help & Troubleshooting] Karpfenhai:
Re: Battery drain in flight mode around 3%/hour

Good luck, I cross my fingers for you!

Tapatalked from my Galaxy SII
[Galaxy S II Q&A, Help & Troubleshooting] pi-xel:
Ok, false alarm. I wiped my internal storage and removed ext SD. Then I put my phone into flight mode and left it alone overnight. The drainage does not seem to have improved (see new dump). What is interesting though is that the drainage does not change much between flight mode with 99% deep sleep on the one hand and sync with radio and wifi on and heavier network load over day with 96% deep sleep on the other. The difference is only around 0.3-0.5%/h. So there seems to be some constant source of drainage that is independent of phone activity.
[Galaxy S II Q&A, Help & Troubleshooting] pi-xel:
But one more thing: I think you have made a very interesting observation: Although the battery drainage when screen off is huge, our screen on time still seems to be pretty good. My analysis is that if there were something draining the battery that should not be there when screen is off AND on, the 3%/h which we see during deep sleep would add up to our screen on consumption and thereby decrease our screen on time as well.

Thus my guess is that our battery problem is related to some component that should be on during screen on and that does not switch off properly when screen is off (eg. screen or GPU).

What are your thoughts on this?
[Galaxy S II Q&A, Help & Troubleshooting] Karpfenhai:
Re: Battery drain in flight mode around 3%/hour

Hmm, I think this should be visible as surfacelinger wakelock then (touch remains active)

Maybe it's smartstay...

To be honest I have no clue...

Tapatalked from my Galaxy SII
[Galaxy S II Q&A, Help & Troubleshooting] megosu:
ok, after wiping everything and flashing a new ROM (Jellybam 7.1), I have removed my SD, switched off wifi, gps, put my mobile in flight mode and left the mobile during the night. This morning, same again:

Level lost [%]: Bat.: -19% (84% to 65%) [3.1%/h]

I have attached my BBS dump file and a screenshot of the battery graph.

1 thing is very weird.. even if BBS says I have 99.8% deep sleep, I can see on the battery graph long period of Awake...

If I check the same with GSAM, the Awake is not displayed... so it is like the default android app see something more or is simply wrong...

have a look at the screenshot and the BBS dump:
[Galaxy S II Q&A, Help & Troubleshooting] pi-xel:
I can confirm the long awake periods in Android battery graph. And I don't think that we have smartstay on SGS2, or am I wrong?
[Galaxy S II Q&A, Help & Troubleshooting] megosu:
no we don't with stock rom 4.0.4 (and I still had the issue), but we do with stock 4.1.2 and some sammy based rom.

In my current rom, I don't have smartstay... and still have the issue of course...

do you see any difference on the graph at the exact same time as the awake shows ?
[Galaxy S II Q&A, Help & Troubleshooting] pi-xel:
@megosu: What do you mean by "difference in the graph"?

@karpfenhai: As far as I understand, you also use GT-i9100, but don't have the issues we are experiencing. Could you maybe provide us with a BBS dump from your phone + a screenshot from Android battery monitor so that we can look for differences (if any)?
[Galaxy S II Q&A, Help & Troubleshooting] megosu:
I mean, do you see the graph decreasing more quickly in your history at the same time it was "awake" ?
[Galaxy S II Q&A, Help & Troubleshooting] pi-xel:
But 1%/h or 1.3%/h is way better than 3%/h :confused: How long was your test period? And what was your deep sleep ratio?

---------- Post added at 11:16 AM ---------- Previous post was at 11:05 AM ----------

Besides, as I've now found out that the speaker itself does not consume much power when not actually playing any sounds (see my last BBS dump), it could also be that the speaker should be powered all the time, that the behavior we perceive with the interference is completely regular. Might be (and that's my current assumption) that our issue is somewhere else.
[Galaxy S II Q&A, Help & Troubleshooting] megosu:
4 hours for the 1st test, then 3 hours for the 2nd (woke up during the night to change battery.... I love this phone....)

I think removing the SD helps a bit too.

I don't know about the deep sleep ratio as I didn't install anything on it, I didn't root it either.

and even if 1%/h is better, it should be 1%/10 hours ;) so we are still far from a real success, especially considering the phone was completely empty, it should do even better than 1%/10 hours (if that's possible).

don't you think ?
[Galaxy S II Q&A, Help & Troubleshooting] pi-xel:
Erm, yeah, 1%/10 hours should be the target. But I personally never saw even 1%/h during the last months. Therefore I would assume that this might be a step in the right direction. And without a BBS dump, we cannot exclude the possibility that ds battery consumption was okay in your case, but that - even if you were in flight mode - some stock apps prevented your phone to deep sleep as it should.
[Galaxy S II Q&A, Help & Troubleshooting] megosu:
could also be that BBS and GSAM are using a bit of battery too when installed.

in any cases, except if all my batteries are faulty (even the 2 new Ankler 1900mAh), I don't see what else we can do to fix this.
[Galaxy S II Q&A, Help & Troubleshooting] pi-xel:
Do you still have ICS stock installed? Could you repeat your test with BBS installed?
[Galaxy S II Q&A, Help & Troubleshooting] megosu:
I can tonight, no pb, but I won't root it though because I need to speak to my store and I want to have stock only.
[Galaxy S II Q&A, Help & Troubleshooting] pi-xel:
Alright, looking forward to your results!
[Galaxy S II Q&A, Help & Troubleshooting] megosu:
Hi,

Tried with BBS installed and it was higher... 3.8% / h.

BBS is constantly FC by the way... Very annoying.

See dump attached (this is with my "old" Samsung battery).

Do you have a higher battery drain with BBS installed ?