yashsingh1/xdaforums huggingface dataset:
[T-Mobile Galaxy Note 4 General] vja4Him:
I found the XDA forums years ago. Great place to ask questions, get help, find answers/solutions, learn more about tech stuff, and share experiences .....

I have already contacted both T-Mobile and Samsung. There is nothing they can do. They don't even know anything about when (or if) there will be an update to fix these issues. They can only give me the usual things to try: 1) Factory Reset (which I've already done, and did NOTHING to fix any issues), 2) Have Best Buy do a Software Reflash, 3) send my phone in for either repairs or replacement.

They also told me the usual .... make sure all apps are updated (which I did). Turn off Bluetooth, WiFi, Roaming, turn down the screen brightness, uninstall recent apps, clear cache, set to Power Saving Mode, turn off GPS ....

So, basically, I should turn my high-tech, highly advanced, high quality smartphone into a Dumbphone, for mostly just phone calls.

Tech Support is usually no help at all. Seems like they just read from a dummy flow chart ... If A, then go to either B or C ... If C then go to D ... etc. and if no fix, then back to the beginning, start all over.
[T-Mobile Galaxy Note 4 General] whitenote4:
Just want to ask is it possible to downgrade from marshmallow 6.0.1 to stock t-mobile lollipop rom?

If yes, is it going to trip Knox protection or may be interfere in future OTA?
[T-Mobile Galaxy Note 4 General] aznmode:
How can I tell how many I have? I know i have messages since 2012 lol so I'm sure I'm over 20k. Restoring my messages with SmartSwitch takes minimum 15 min.
[T-Mobile Galaxy Note 4 General] vja4Him:
When I back up my text messages, the app shows me how many messages that I have. That is how I know how many text messages that I have.
[T-Mobile Galaxy Note 4 General] aznmode:
Got it. So it says I have 10525 items in Smart Switch. I remember when I updated to 5.1.1 I had the same lag issue with 1 recipient. Didn't affect the others. Never deleted our conversation so it was a good 5 year record at least and we texted a lot. After finally deleting our conversation then the lag went away. This is why I think it's a memory thing.
[T-Mobile Galaxy Note 4 General] HenryP1:
Just though I chime in. After updating to Marshmallow my phone became pretty much useless. I did most of the tricks. Delete cache, reset software from scratch and nothing solved my problem. Also got a new battery just in case. Oh, even removed the sd card. The issues: lag, random reboots, freeze, black screen, it would reboot in download screen, all kinds of stuff. Well, finally downgraded to Lollipop 5.1.1 via Odin3, FW from SamMobile site and my phone is great again. No more issues. It did take several hrs to get it going, but now everything is back to normal. Almost purchased a new phone over this problem.
[T-Mobile Galaxy Note 4 General] whitenote4:
As I had asked earlier in other threads can you please elaborate the process for noobs who want to downgrade.
[T-Mobile Galaxy Note 4 General] HenryP1:
Oh ok. Must have missed your earlier.

I did the following, being a noob myself it worked:

These are the Instructions I followed....

SamMobile website has the firmware and odin.

Extract Odin ZIP file

Open Odin v3.11.1

Reboot Phone in Download Mode (press and hold Home + Power + Volume Down buttons)

Connect phone and wait until you get a blue sign in Odin

Add the firmware file to AP / PDA

Make sure re-partition is NOT ticked

Click the start button, sit back and wait few minutes
[T-Mobile Galaxy Note 4 General] whitenote4:
Thanx a ton man...gonna try it myself tonight. Wish me luck :)

Did you flashed modem and bootloader as well?
[T-Mobile Galaxy Note 4 General] HenryP1:
No problem. No. Just what was mentioned in the instructions. Make sure battery is fully charged. Low battery didn't allow it to install properly when it was rebooting. Good luck. Oh the firmware 5.1.1 download takes forever as they limit the speed if you choose the free download. I ended up purchasing a silver membership for 16$ to speed up the process. Im sure that had I looked around I would've found a another source to downlad it for free alot faster.
[T-Mobile Galaxy Note 4 General] whitenote4:
Atlast I did it.. Flashed lollipop 5.1.1 on my t-mobile note 4. Fingers crossed lets see...

Disabled system updates just to avoid those pesky marshmallow update notification. Again fingers crossed
[T-Mobile Galaxy Note 4 General] HenryP1:
:good: Glad it worked out for you so far. I know how miserable it feels when your phone isn't working properly with Marshmallow. I've been running smooth since the downgrade.
[T-Mobile Galaxy Note 4 General] vja4Him:
Thanks. I saved these instructions. I'm going to have Best Buy do the Software Reflash first ..... If that does not fix the issues, then I will try downgrading back to Lollipop .....
[T-Mobile Galaxy Note 4 General] vja4Him:
I sent a second message directly to Samsung, concerning the serious battery drain with Marshmallow on my Note 4. I think that the responses I am receiving via email are automated. Because their response did not even acknowledge my message I sent. I received almost exactly the same reply as the first time.

The reply I got told me to do the Factory Reset, which I already did. I told Samsung that I already did the Factory Reset several times.

When I called Samsung, they even told me that my one year warranty has expired ... !!! I got my first Note 4 in late November, 2015. Got my replacement Note 4 (Camera would no longer focus, which is a known issue with certain IMEI numbers) in May, 2016. The Samsung representative told me that I have a one-year warranty. So that means that my warranty is still good until late November, 2016. I pointed out this error to him, but he still insisted that his records show that my one-year warranty has expired ... !!! WTH is wrong with Samsung ..... ???
[T-Mobile Galaxy Note 4 General] HenryP1:
No problem. I actually had them do it twice, issues were still present. I spent 2 hrs in there.. They claim its not a widespread problem. I said you need to go online, he said you can't believe everything you read online smh lol. Samsung requested I send it in for repairs. My warranty was expired. I also mentioned the camera issue, but I left it as is. I learned to just tap it so it can focus. Good luck.
[T-Mobile Galaxy Note 4 General] vja4Him:
The camera issue on my Note 4 was so bad, sometimes it would take me 30 minutes or longer before I could take a picture ... !!! I tried the tape method, shaking, tapping, changing the Settings, restarting, clearing the cache, wipe cache partition .... I even started using my Note 3 to take pictures instead. T-Mobile replaced my Note 4. Only cost me $5.00 (US). Good thing I have full insurance, or I would have had to pay, I think over $100.00.
[T-Mobile Galaxy Note 4 General] vja4Him:
If the Software Reflash from Best Buy does not fix the issues, I will consider getting the Note 7 ..... ZeroLemon is working on a hefty battery pack for the Note 7 .....

I might just wait to see if Samsung puts out a Note 8 ..... Maybe they will bring back the removable battery .....

I really like the S-Pen feature. I also prefer to have an internal Micro-SD Card for backup, and lots of storage. Removable battery is a must for me because I am a Power User ....
[T-Mobile Galaxy Note 4 General] whitenote4:
You know what... Lollipop rom is amazing but I kinda loved marshmallow. As I haven't properly set up my phone yet. Should I try flashing marshmallow rom again? Is it possible that it wasn't flashed properly through t-mobile ota?

Flashing my phone again and again will do any harm?
[T-Mobile Galaxy Note 4 General] HenryP1:
Well, at Bestbuy they did flash Marshmallow twice and t didnt help. I originally downloaded it ota. was fine for about 10 minutes then the problems came back. I'm no expert but you can give it a try. I agree Marshmallow is great, but I may wait until an updated version is released to try it again.
[T-Mobile Galaxy Note 4 General] HenryP1:
..

---------- Post added at 02:10 AM ---------- Previous post was at 02:08 AM ----------

How did you make out?
[T-Mobile Galaxy Note 4 General] whitenote4:
Lolz it didn't worked out, again same problems, stutters restarts. Had to flash LP Rom again.
[T-Mobile Galaxy Note 4 General] VergiL09:
After reading all the recent posts here, I think I won't update my N4 yet.

Anyone here who has no major issues with theirs?
[T-Mobile Galaxy Note 4 General] Mr. Clown:
None so far. I did a clean install and no issues at all, my note is working great.
[T-Mobile Galaxy Note 4 General] HenryP1:
Ok. Well, since my downgrade to 5.1.1 im still having some issues. Not as bad as Marshmallow. I never had these issues until I updated to M. I still get random reboots, freezing, reboots in download mode etc. Im going back down to my S5 until I can sort things out.
[T-Mobile Galaxy Note 4 General] GTRagnarok:
Marshmallow is a keeper for me. I was still on KitKat before this, choosing to skip Lollipop (which I did try once). I did a clean install after wiping everything and it's been great for me. Stock rom + rooted + BeastMode kernel by freeza. Very stable for me and battery life is fine. Compared to KK, app installations/updates seem to be slower but app launch times are much faster, which is a good tradeoff. All the Xposed mods I use still work, so I'm pretty happy about that too. My only issues are the missing data toggle and private mode not working, though they're not that huge of a deal for me. I'm quite satisfied overall. This awesome phone keeps on going, and I'll continue using it for the foreseeable future.
[T-Mobile Galaxy Note 4 General] VergiL09:
Okay thanks for the reply :)

Will definitely try it, I'll just downgrade back to LP if ever I had any issues.
[T-Mobile Galaxy Note 4 General] whitenote4:
Please do share your experience after upgrade. In my case Media was misbehaving, using too much battery and android system was the other culprit. Best of luck
[T-Mobile Galaxy Note 4 General] tnizzle:
Bluetooth no loner works with my Car, GPS lock issue, and unable to recognize USB device when plugged to PC ( usb debugging checked off, so I can't go back to 5.1.1. !)
[T-Mobile Galaxy Note 4 General] vja4Him:
Note 4 ... Bad Luck .....

I guess I must just be having very bad luck with the Note 4. This is my 3rd Note 4. My first Note 4 had the well-known Camera issue (would not focus). My IMEI number was on the list of camera issues. My 2nd Note 4 I got rid of because the Marshmallow Update destroyed battery life, and also many other issues.

My replacement Note 4, running Lollipop, which I've had for only five days has issues. Battery life is not good, but a little better than the previous Note 4 with Marshmallow.

Sound on this 3rd Note 4 does not work sometimes. Random reboots. Overheating. Lagging. Bluetooth issues (same Bluetooth issues with both previous Note 4 devices). Also have serious Bluetooth issues with my Note 3, but my Note 3 still has excellent battery life. The only major issue with my Note 3 is Bluetooth frequently loses connection.

If the price is right ..... I'm seriously considering getting the Note 7 ..... ZeroLemon is working on some kind of special battery pack for the Note 7 ... And the Note 7 has an SD Card Reader, up to 200GB. And there is a "Blue" Note 7 model, which I really want ... !!!
[T-Mobile Galaxy Note 4 General] SteveRiley:
As with some of you, my MM experience has been unpleasant. Previously I had Pop Rocks 5.0.1 on the phone and it ran flawlessly. The last several days I've been trying to get MM to work and I'm seeing serious lag and random reboots. I removed my SD card and that didn't make any improvements.

First I tried the stock .tar file DeeXii posted. My procedure:

1. Ensure SuperSU zip is on external SD card

2. Boot TWRP recovery (currently 3.0.2 installed)

3. Wipe every partition except external SD

4. Boot the phone into download mode

5. Odin (3.0.9) the ROM to the phone

6. Odin TWRP back to the phone

7. Boot TWRP recovery

8. Flash SuperSU zip

9. Reboot and let settle for 15 minutes

I've also tried the dev-base MM ROM; same problems.
[T-Mobile Galaxy Note 4 General] SteveRiley:
[SIZE=+1]Important discovery![/SIZE]

In another thread, I learned that MM 6.0.1 should be flashed with Odin 3.11.1. Previously, I had flashed the stock .tar file using Odin 3.0.9. This gives you an incomplete flash! It misses the file cache.img.ext4. The absence of that was the cause of all my performance problems.

After I downloaded Odin 3.11.1, it took three tries to get a successful flash. But I'm finally rocking MM on my Note 4 without any lag or stutters or reboots. My suggestion: if you're having these issues and you didn't flash stock with Odin 3.11.1, give that a try.
[T-Mobile Galaxy Note 4 General] whitenote4:
But I had an OTA but still had these weird lagging freezing... And random restarts.
[T-Mobile Galaxy Note 4 General] DeeXii:
Not true! Been using exclusively using 3.09 on several devices (even newer Tab S2 T713) with ZERO issues.

Perhaps your specific 3.09 was borked.
[T-Mobile Galaxy Note 4 General] SteveRiley:
How can it be borked? It's a single .exe file. Perhaps there are some additional variables here that no one has discovered yet. What I do know is that Odin 3.0.9 was missing the file cache.img.ext4 when flashing stock MM 6.0.1 to a N910T that had 5.0.1. Odin 3.11.1 flashed every bit of the ROM.
[T-Mobile Galaxy Note 4 General] DeeXii:
Dunno how it can be borked. Just was pointing out that I only use 3.09. I have used it on my phone, my wife's phone, my dad's phone, and sent it to a buddy of mine as I was walking him through flashing phones.

Not one of the phones I mentioned had issues.
[T-Mobile Galaxy Note 4 General] Four_Wude:
My Note 4 has been fine running on a fresh install of MM. Only issue I have is Bluetooth skipping during playback (which seems to be pre-existing). :(
[T-Mobile Galaxy Note 4 General] SteveRiley:
[size=+1]Updated discovery![/size]

As you can see in post #29 in the the thread below, I was omitting an important step after flashing the stock .tar image file. Rather than letting the boot immediately, I was flashing TWRP and then letting the phone boot. This was my actual mistake. That initial boot process immediately after the image flashing is what apparently creates the /system/csc folder.

Perhaps that one time when it sort of worked for me with Odin 3.11.1 might have let the phone boot immediately after installing and got the /system/csc folder then, too. I can't remember now, I'm kinda sick of flashing and reflashing at this point. I'm just happy to have a phone that's working normal again.

http://xdaforums.com/note-4-tmobile/help/csc-folder-stock-mm-t3437091
[T-Mobile Galaxy Note 4 General] whitenote4:
I have developed weird issue of random 5 - 10 sec freeze. Whatever taps I make during the time the fone is frozen it remains unresponsive but after a few seconds it responds to all the tap commands but after 10 seconds.

Some times I have to put phone in standby mode to sort the problem .

But after that initial problem it is perfectly normal and responsive.

How do I fix this issue

P. S - I have cleared cache several times.
[T-Mobile Galaxy Note 4 General] ch4ch0:
I upgraded my T-Mobile NOTE 4 a month all OK but now I'm having all this issues. I have done all you sayed ftom the beguining but I don't know I haven't flashed nothing to it and now ramdonly reebot, sometimes reboot to download mode, and even shows a weird screen showing "fatal kernel error".
[T-Mobile Galaxy Note 4 General] Kevindroid:
That what's exactly happening to me as well. Now I don't know want to do.
[T-Mobile Galaxy Note 4 General] Kevindroid:
I had try everything, hard reset, reflashed a official stock rom, bought 2 new batteries. Nth was working, always reboot and freeze. The only thing to solve this is to install "wake lock- PowerManager" on the playstore and then click on "partial_wake_lock" now my phone is working fine. Does anyone know what really happen? software or hardware issue?
[T-Mobile Galaxy Note 4 General] VergiL09:
All these reports are making me want to NOT even try the official MM update when I get my N910T back.
[T-Mobile Galaxy Note 4 General] Bruce lee roy:
Trust me when I say MM is the best thing that has ever happen to this phone. The majority of these reports are coming from new members trolling the Internet looking for solutions to botched ota updates.

If you decide to update ota Wipe everything (internal and ext) and factory reset after update.

ODIN, like always, is the safest route. Of course you want to perform a full wipe than as well since this is a major overhaul to entire system.

Follow these instructions and you will be pleasantly surprised by the performance and stability of mm.
[T-Mobile Galaxy Note 4 General] ch4ch0:
Why can not downgrade to 5.0.1???
[T-Mobile Galaxy Note 4 General] Bruce lee roy:
You can but I would recommend 5.1.1. Over 5.0.1. Because it's a much more stable build.
[T-Mobile Galaxy Note 4 General] SteveRiley:
I'm glad it worked for you. But your characterization of those with issues is wrong. Many of us aren't flash newbies and definitely experience numerous issues that manifested themselves only after flashing 6.0.1. Perhaps we've hard marginal hardware that the flash process exacerbated problems with. But the issues certainly aren't related to a misunderstanding of how to install new firmware and ROMs.
[T-Mobile Galaxy Note 4 General] Bruce lee roy:
My "characterization" is accurate; just look at the membership status of most of the posters in this thread. That's not to say there's anything wrong with being a newbie but, the fact remains, you are among the minority of people experiencing "numerous issues" after upgrade.
[T-Mobile Galaxy Note 4 General] SteveRiley:
Have you looked on other Android and Samsung forums and on Reddit? Note 4s are dying like crazy. Most occurrences happen after MM upgrades, but some people are reporting lags and freezes even without upgrades. There's definitely some kind of problem going on.
[T-Mobile Galaxy Note 4 General] VergiL09:
Does the Stock MM based ROMs have the same issues? Or only with the official one?
[T-Mobile Galaxy Note 4 General] whitenote4:
Really... some kinda problem going on??

My phone died on me last week after marshmallow update. Y would a newbie try flashing roms bootloaders. We r not engineers, hackers or doing it for some adventure or thrill. I was quite happy with my stock rom for abt 1 yr but after the update hell broke on me. I mean who would risk a 700 dollars phone for flashing for the first or second time. It wasn't for fun but it was a necessity as T-MOBILE Fu*ked up with update.

Good for u.. Ur phone is working fine but no one needs ur EXPERT OPENION. :good:
[T-Mobile Galaxy Note 4 General] ch4ch0:
I have been flashing my N910T since 4.4.4

Never had any issues with ROMs flashing until now.

The phone get rebooting ramdonly, most of the time when wake up from iddle state. Sometimes reboot to download mode because can't do normal boot and give a "ddi : mmc_read failed"

Surfing web founded same problems with differents models of Note 4.

I can't downgrade to my previous 5.0.1 because ODIN gave me a writing error.
[T-Mobile Galaxy Note 4 General] duh-rel:
I guess you can count me in that minority. I started experiencing issues while in KK (FireKat v21) and the upgrade to stock MM left my Note 4 unusable. I've also tried custom MM ROMs (primarily Maximum Ovrdrive) with similar issues. I've been flashing ROMs since 2011 so I wouldn't say I'm a newbie despite what my membership status reflects.
[T-Mobile Galaxy Note 4 General] Daniel RR:
Me and other three friends(despite that we are noobs) after the MM update(s) every time we cleared Cache partition from Recovery Mode and solve the lagg/freeze/slow phone issues (sm-910f with T-mobile logo on startup)... But the faster-drain -battery issue still persist
[T-Mobile Galaxy Note 4 General] VergiL09:
Similar issues even on custom roms? Okay, no MM for me, will stick to LP custom roms.
[T-Mobile Galaxy Note 4 General] duh-rel:
Yes. I was experiencing lags and apps crashing on KitKat for about a month, which led me to update to stock MM. That's when things got worse with random reboots, mmc_read errors, and constant battery pulls to get the phone to boot up.

What I gather from other users, there was a time in the Note 4's production that included a run (or multiple runs) of motherboards that were susceptible to developing performance issues over time. It appears that upgrading the software, in particular to MM, has led to increased reports of these issues occuring.

From what I've seen, the proper solution would be motherboard replacement. I've read of users successfully getting their phones to work by downgrading to LP, but this doesn't sound like a long-term solution. Time will tell whether those users come back with positive reviews or failed hardware.
[T-Mobile Galaxy Note 4 General] Bruce lee roy:
Give about a week to settle in.

---------- Post added at 06:48 PM ---------- Previous post was at 06:46 PM ----------

This is a very difficult position to support. I have one of the very first SD Notes sold and have not had any of those issues.
[T-Mobile Galaxy Note 4 General] duh-rel:
I'm not hypothesizing that the affected motherboards only came in the first run of Note 4s. Mine was a refurbished unit from Vietnam (my first unit I got during preorder had the faulty camera). Units manufactured midcycle, for different markets/regions, and/or different plants could have included the affected boards. I'd find it hard to believe if Samsung used only one motherboard manufacturer to supply the whole global Note 4 lineup.

In the end, we won't know whether it's hardware failure or user error, unless Samsung issues a recall, which likely won't happen.
[T-Mobile Galaxy Note 4 General] VergiL09:
Man I really hope mine isn't affected, buying a new phone isn't in my budget now, and a new motherboard doesn't sound cheap. I bought mine new on early 2015
[T-Mobile Galaxy Note 4 General] Bruce lee roy:
So... it's a hypothesis.
[T-Mobile Galaxy Note 4 General] harristblack:
Ive getting terrible battery life.

---------- Post added at 03:06 AM ---------- Previous post was at 03:05 AM ----------

I've been getting terrible battery life.
[T-Mobile Galaxy Note 4 General] duh-rel:
Hopefully you don't suffer the issues many of us had. These are expensive devices and should last longer than the 14 months I've had mine.

Motherboards go for about $120 on eBay when I checked last month. Add to that, who knows if it's a quality product. I've gotten several Nexus 5 screens at various prices and they all suffer from uneven backlighting after a couple of months. These issues aren't immediately apparent but crop up through usage/age, but by then the window of time to provide feedback on eBay has closed.

And even if you get a quality product, the DIY replacement process is not easy according to the iFixit teardown.

Have you tried using a new battery? Battery life should have improved judging from other users' experiences.
[T-Mobile Galaxy Note 4 General] VergiL09:
Apparently I got lucky, cleared everything, flashed EPE3 on Odin, rooted, then cleared again, flashed deodexed and rooted EPG2 by pvsgh.

No issues so far, great battery life too.
[T-Mobile Galaxy Note 4 General] conket:
Hi Vergil09,

Could you show me a thread that has instruction of rooting EPE3, please? Early today, I used CF autoroot on EPG2 and after restart it stucked at samsung logo, so I downgraded succesfully to EPE3. Tmobile is downloading OTA, I went in and pause it for now.

Thank you in advance.

Update: I found it, and did it as yours to rooted EPG2 by pvsgh. Thank again
[T-Mobile Galaxy Note 4 General] notoriouspk:
Flash twrp through Odin

From Odin flash cf root .zip

Works for me :)