yashsingh1/xdaforums huggingface dataset:
[Samsung Galaxy S21 Questions] blinkin:
Thanks a lot. I was looking for it in a completely wrong place - Bixby app.
[Samsung Galaxy S21 Questions] AngelNine:
Hmm for me AUB6 and AUB8 worked well, I have the normal S21 Exynos version.

But after AUB6 I wiped my chache and I use 4G all the time.

SOT I have 7h and Standbye 1day and 12h
[Samsung Galaxy S21 Questions] joakimbo:
Hmm.. You're getting almost twice the battery life I got. Do you have location, Bluetooth etc on?

I'm getting 4 hours in 20 hours. On AUB6 I got 6 hours SOT with same usage. Worse after AUB8.
[Samsung Galaxy S21 Questions] mysterioustko:
Many areas have stopped 2G service. So if you're setting that routine, make sure when you're connected to wifi, you're in an area that has 2g service, otherwise you won't receive texts or calls. Additionally, I don't think you will really gain anything by being on 2g vs lte as it relates to battery. I think it's an unnecessary crippling.
[Samsung Galaxy S21 Questions] blinkin:
Yeah I'm switching to 3g and drain is gone
[Samsung Galaxy S21 Questions] mtm1401:
Whatever works in your area, I definitely still get 2g but when I'm at home it doesn't matter as I'm on WiFi with WiFi calling. As soon as I leave my house my 4/5g turns on so hardly crippling.

When I've measured 4g Vs 5g signal, there doesn't seem to be much difference in the dBm (unless there is a limitation on the app I'm using), however 3g dBm is much lower Vs 4g hence less power drain, didn't actually check 2g Vs 3g

Edit: Having quickly tested signal strength, appears to be no difference between 2g and 3g signal strength, so keeping on 3g will have the same effect - makes sense as I believe they utilise the same bandwidth
[Samsung Galaxy S21 Questions] HorasCZ:
I have almost exactly the same SOT about 4 hours.
[Samsung Galaxy S21 Questions] lomastem:
after a wipe cache and aub8 installed two days ago

monitoring with gsam,

bluetooth on, wifi on, two sim 5G/4G, 120hz adaptiv, dark mode and some application sleep or deep sleep (chrome, facebook ... )

i have 6,5 hours SOt and 1day 4 hours of use

it's cleary the screen taking A LOT on mine.

I think by some days it should optimize himself more

Today i will try this "Adaptive power saving" suppose to low the CPU to 70%
[Samsung Galaxy S21 Questions] mtm1401:
Just to clarify, when you say 'phone is connected to WIFI and data' - do you mean that you've turned on 'Mobile data always active' in developer options, or just that you haven't turned off mobile data in the connection settings/notification bar settings when connecting to wifi?

It's really strange that you'd see differences in drain whilst on Wi-Fi, as by default the phone should switch off mobile data in the background if you have Wi-Fi calling on and haven't turned on 'mobile data always active'.

I would still recomend trying GSAM battery monitor, and comparing the outputs between a day of 4g and 3g, might give some idea of what's causing the difference as the stats are much more detailed than the inbuilt monitor. (it shows battery used by radio transmission as well as android system/kernel).

Can also use something like the 'signal strength' application to compare actual signal strength between 3G & 4G as there is a difference (I have a -117dbm 4g vs -96dbm 3g signal at home,). I don't know the exact relation between the dbm and power draw from the phone (potentially 3dbm is worth 2x the power) but that's a substantial difference between the two and likely to result in increased drain on the battery
[Samsung Galaxy S21 Questions] skyline91:
I didn't turn on "mobile data always active". I just checked for signal at home, 4G is at -74dBm and 3G is at -57dBm. I had installed BBS but i didn't see any weird wakelocks. I could try with GSAM.
[Samsung Galaxy S21 Questions] mtm1401:
That is really strange, signal is still really good so shouldn't be that regardless

Yea give GSAM a go and see what changes between a day of 3g and day of 4g.

I wish I didn't have such crap signal at home, as I've got no idea what it'll be like when we're allowed outside again :unsure:
[Samsung Galaxy S21 Questions] AngelNine:
Yeah I have Bluetooth connected 24/7 to my Samsung Galaxy Fit2 and GPS is always ON, but no AOD and only I'm using only 4G
[Samsung Galaxy S21 Questions] phil_666:
hello

I ve change my note 10+ for a S21 5G exynos version. I ve found the autonomy for the moment not good , ive to wait .
[Samsung Galaxy S21 Questions] skyline91:
Comparison between 3G and 4G. I only see difference in 4G in Android System part, it was using more time Accelerometer, Magnetometer and Barometer. Everything else 3G used longer since. And funny part is that most of the day when i was using 4G I was at home. When i was using 3G i went for a walk and i was in gym. 🧐
[Samsung Galaxy S21 Questions] phil_666:
hello

tommorow the autonomy look like better than yesterday, a good phone finally - i will see after days of using what's happend with the battery.
[Samsung Galaxy S21 Questions] blinkin:
What do you mean with "autonomy"?
[Samsung Galaxy S21 Questions] braindamage90:
I think he meant battery life. In italian and spanish, for example, "autonomia" means also battery life
[Samsung Galaxy S21 Questions] mtm1401:
Really strange as your % drain per hour is twice as high with the 4g, but no obvious difference in what's doing it.

Few questions;

1. Have you tried 4G but turn off VoLTE? Seen a few people saying it fixed their standby drain.

2. Also if you're on WiFi you should turn on WiFi calling under phone >s ettings as stops you being connected to WiFi and mobile

3. Standard s21?

4. Exynos or SD?

5. Do you ever see 'cameraservice_worker' under android system wakelock details?
[Samsung Galaxy S21 Questions] joakimbo:
This simply isn't good enough. I've tried a factory reset. I'm on AUB8, latest February. I expect more than 4 hours SOT on a flagship device in 2021. Its gotten worse after last update tho. If Samsung doesn't fix this, I'm gonna return it.

Edit: S21 Exynos.
[Samsung Galaxy S21 Questions] Blkjck11:
I haven't read every post here, so I'm not sure if people are just referring to the exynos version or the snapdragon. But I just got the Snapdragon version about a week ago and noticed incredibly horrible battery life from the start after setting it up and installing apps. For me after a bunch of different troubleshooting steps it turns out it was windscribe VPN, that was draining my battery so much. And yes I know apps are always a possible issue, but coming for my last phone the OnePlus 7t pro, I had zero to very minimal issues with the same VPN. Literally getting 2.5 to 3 times the battery life over the course of a day, today l, after uninstalling it uninstalling. Don't have any screenshots to compare. but I'm just saying check the various apps you have on your phone, because this seems to be the one that was affecting me on my Snapdragon s21
[Samsung Galaxy S21 Questions] braindamage90:
are you talking about s21? or ultra?
[Samsung Galaxy S21 Questions] joakimbo:
S21 Exynos.
[Samsung Galaxy S21 Questions] pixiebob:
I notice real improvement if i disable double tap to wake screen.

edit: S21 snapdragon TGY
[Samsung Galaxy S21 Questions] blinkin:
For me it didn't change anything😞 s21 exynos
[Samsung Galaxy S21 Questions] phil_666:
I meant battery life. Yesterday it was better with 6 H 37 of SOT. At midnight I had 23% left and I must have lost 1% tonight.

It's still correct I think, I'm used to SAMSUNG and I've never had a crazy autonomy with it.
[Samsung Galaxy S21 Questions] xdafly:
Couple things to try before you do that.

1. Watch the YT videos (many featured on xda already, easy to find using search terms like setting up...new S21 now what ... change these S21... etc etc ) and modify your Settings accordingly

2. Run ADB AppControl Extended (well worth the $7) and disable apps & services.

Have now "tuned up" (or down..) multiple S7 tablets and S21 phones and all are having very little battery drain.
[Samsung Galaxy S21 Questions] naufrager:
I was about to get an S21 Exynos, but I'm really worried about the battery life you guys are showing. I mean, it's a flagship, if it comes down to having to disable all the flagship functionalities and double tap to wake and so on it's not gonna make it for me unfortunately, even tho I was really bluffed by the camera.

Anyone had just better results with time and updates without having to disable everything?
[Samsung Galaxy S21 Questions] skyline91:
1. I have turned it off now and i need to test it more to see the results.

2. My provider doesn't have vowifi.

3. Standard s21

4. Exynos
[Samsung Galaxy S21 Questions] references:
No issues with battery life here, though i did make a factory restart after last update. S21 Exynos.
[Samsung Galaxy S21 Questions] joakimbo:
Hmm.. I don't if this is any good though. You've watched YouTube for almost 4 hours. That gives a lot of SOT but isn't especially heavy for battery.

Mostly WiFi or mobil data?
[Samsung Galaxy S21 Questions] JCMate10:
Thank you for making it a lot easier for me to decide if I should buy the S21 (again) or go with something else... It is madness that any of that is needed on a 2021 flagship device, made by a company who have been making phones since forever. I hope someone from Samsung is reading this thread...
[Samsung Galaxy S21 Questions] skyline91:
This is battery life when i turn off volte, maybe a little better, but still far away from 3G.
[Samsung Galaxy S21 Questions] joakimbo:
We got exactly the same battery issue I see.. I'm barely getting 4 hours in a day, as well.

I think there are some kind of wake locks from the system. When I activate power saving mode, standby drain is a lot better tho..
[Samsung Galaxy S21 Questions] skyline91:
I solve issue when i turn off 4G.
[Samsung Galaxy S21 Questions] SpiritBreak3r:
This is quite embarrassing. Flagship phone, people recommending to disable apps and switching a low tier network that's a decade old, not even enough for it to survive a day.

I'm taking my pitchforks to samsung hq.
[Samsung Galaxy S21 Questions] JCMate10:
... not trying to be smart or anything, but actually... It seems you weren't right after all :ROFLMAO:

7 more pages of comments and issues have been posted after you made this "look at me" statement ;)
[Samsung Galaxy S21 Questions] shem2409:
The battery on my 512Gb Exynos version is an absolute joke as well. Today I barely hit 4hrs SOT. I am seriously considering going back to my P30 Pro.

I will give Samsung a few more days to fix this with an update as I enjoy the phone otherwise (and already bought a few cases) but it's very disappointing
[Samsung Galaxy S21 Questions] rossi1991:
After seeing these posts i have decided not to buy S21. I almost bought it but thanks to all your discussion, i have changed my mind..
[Samsung Galaxy S21 Questions] joakimbo:
For sure, there is something wrong with the February updates. Battery on mobile data is draining so damn fast. Yesterday I was out driving on work. Barely used the phone during 8 hours. Lost 40%. That's insane.

They need to fix the modem firmware, or else I'll return it, as well!
[Samsung Galaxy S21 Questions] syrinx75:
I had a noticeable improvement of battery life: I've deactivated all the routines running when the screen is OFF (ex: detection when the phone moves, detection when the phone seats on his screen, etc...) All those are on the same page of settings.
[Samsung Galaxy S21 Questions] Bxrider117:
So I am a long time Samsung user. I had the S20 plus and wanted to try the smaller S21. Only because of the trade in for the plus with Samsung. I have the S21 256gb unlocked snapdragon version. I just got the phone yesterday. Here is a copy of my battery life after getting my apps loaded. The battery life is almost 7 hours screen time which is all on WiFi. Mostly logging into my apps and cleaning up contacts and playing with the phone. After a few days I'm sure the battery life will get better.
[Samsung Galaxy S21 Questions] joakimbo:
I think battery life issues are mostly related to the Exynos model. I'm quite sure it's an issue with the modem firmware, since people are reporting battery life issues on LTE/4G
[Samsung Galaxy S21 Questions] shem2409:
Last nights update for Exynos version seems ro have fixed the battery life for me. I am back from work and I have 50% battery with 3.5h SOT.

I have put my screen back up to WQHD and switched on AOD now. Hope it remains this good in the upcoming days :-)
[Samsung Galaxy S21 Questions] joakimbo:
Yess!! Let's hope it solves my drain on the S21 base model as well.
[Samsung Galaxy S21 Questions] naudmick:
I installed this update today on my S21, but Samsung seems to have removed it from the ota servers. Weird I hope this doesn't hide a bug yet. Because available this morning and withdrawn this evening.
[Samsung Galaxy S21 Questions] joakimbo:
Ah okay.. Hmm.. How can you know that if you already updated? Did you see any improvement?
[Samsung Galaxy S21 Questions] naudmick:
I saw it with phone info, because after having updated the last firmware in OTA had returned to AUB8. But honestly yes a visible change. I charged 100% last night, this morning I am at 87% after 12:23 hours of use. And 1 hour of stupidity. 😉
[Samsung Galaxy S21 Questions] joakimbo:
That's really promising. What model do you have? Processor?
[Samsung Galaxy S21 Questions] naudmick:
S21 exynos 😉
[Samsung Galaxy S21 Questions] xdafly:
Have no issues on two(2) phones directly from Samsung. Both have received a 690 mb size update within last week and both were wiped cache after setup and updates.

Disabled about 25 apps and services via ADB AppControl Extended version.

Both are charged up until about 85% battery and then disconnected and used heavily for work about 6 to 7 hours daily. In the morning, charge level is around 45% and charged until 85%.
[Samsung Galaxy S21 Questions] joakimbo:
It's for sure something wrong after updates. I've used the phone with the same apps and same usage since start. Had consistently 6 hours SOT over 24hrs at the beginning. After the February update I was down to 2-3 hours SOT. New update came, back to 6 hours. New update again, 4 hours SOT.

I've seen people on reddit complaining about exactly the same battery after these updates.
[Samsung Galaxy S21 Questions] xdafly:
Used a lot of examples from this video but even more

youtube.com/watch?v=fxT-9DKytlw
[Samsung Galaxy S21 Questions] joakimbo:
Do you still feel the improvement in battery life?
[Samsung Galaxy S21 Questions] shem2409:
Yeah definitely. I am on 38% battery after a full day of use with AOD and WQHD. 3h 45 SOT. Never had a result even close to this on any other device
[Samsung Galaxy S21 Questions] joakimbo:
That's great to hear. My guess is you're on the ultra, right?
[Samsung Galaxy S21 Questions] shem2409:
Yeah S21 Ultra 512Gb... I just realised I might have posted on the wrong group. Sorry
[Samsung Galaxy S21 Questions] joakimbo:
No worries. It's the same processor, so I guess it applies to both phones anyway.
[Samsung Galaxy S21 Questions] russellcausier:
Best I've ever got out of a Samsung phone!

S21 ultra exynos after March update is a beast and good enough for me,also using the galaxy hz mod with 96hz/48hz adaptive refresh rate 👍🏻 with 11%left
[Samsung Galaxy S21 Questions] joakimbo:
Nice. Did you notice an improvement after the update as well? Which country are you in? Haven't gotten the update here yet.
[Samsung Galaxy S21 Questions] russellcausier:
Yeah definitely noticed the difference,like someone's stated somewhere battery life was great then Feb update screwed it,now back to normal and seems way better 👍🏻 I'm in UK got update Friday evening,also few adb removals and on battery saving mode (trick so still runs 96hz)
[Samsung Galaxy S21 Questions] joakimbo:
Not bad. Do you feel much difference with 96hz vs 120hz? Also.. What adb tricks do you use?
[Samsung Galaxy S21 Questions] russellcausier:
Tbh can't really tell between 96 and 120 still trying to figure out if this galaxy hz mod saves battery with adaptive 96hz and 48hz or takes battery in background 🤔 as still have good battery when I don't have this mod when it's 120/60hz,mainly adb Facebook services and bixby wake think I've read somewhere they are bad on battery and always get rid of digital wellbeing,although shouldn't really have to do all this messing around on a phone like this 🙄 same with ultra 20 but that was awful chip exynos 990 this 21 is the phone that should have been 👍🏻
[Samsung Galaxy S21 Questions] naudmick:
Hi everyone, well I am fully satisfied with the March update.
[Samsung Galaxy S21 Questions] joakimbo:
Two days? You feel its better? S21 or ultra?
[Samsung Galaxy S21 Questions] naudmick:
S21 ( SM-G991B) not ultra.

Yes the autonomy is really very good now.
[Samsung Galaxy S21 Questions] joakimbo:
Finally got the update. Let's how it behaves. Currently on a cabin with wifi connected all the time, so I'll give it some time to see how it behaves.
[Samsung Galaxy S21 Questions] pixiebob:
It's impressive you get very good battery life as good than my snapdragon
[Samsung Galaxy S21 Questions] phil_666:
i confirm the automy look like good with the last update. Hope samsung will continue their good job for the next updates
[Samsung Galaxy S21 Questions] Mickepilot:
Unfortunately, Samsung did NOT fix the standby drain issue with ACTIVATED "VoLTE" in the new "AUBB" update. The battery still drains about 3% per hour with "VoLTE" selected ON.

However, with "VoLTE" switched OFF, I get only about 0.5% drain per hour. Same as before the update.
[Samsung Galaxy S21 Questions] Levisaurus:
It's still bad for me, this is with location, mobile data, VoLTE all off while on Wi-Fi

Guess i'm still using 3G, by this time i'm wondering if this will ever get fixed
[Samsung Galaxy S21 Questions] dor_t:
It is the Same for me with AUBB as before the update.

Battery still draining.

S21+, exynos.

🤦‍♂️😔
[Samsung Galaxy S21 Questions] fabiok81:
After the new update my s21 256gb finally has a good battery time like genuary update.
[Samsung Galaxy S21 Questions] ivor987:
Got AUBB in Croatia 2 days ago. Can't make it last 4 hrs SOT, and also experiencing standby drain. As shown in the graph, had to charge it a little at the end of the day...

Volte off

120 hz

5g

S21+ Exynos
[Samsung Galaxy S21 Questions] joakimbo:
Yeah. Not much of an improvement here either. Looks like problem still persists.
[Samsung Galaxy S21 Questions] joakimbo:
Here's my battery after March update. This is mostly on mobile data tho. But I'm still not satisfied, even though it's gotten a bit better..
[Samsung Galaxy S21 Questions] andy18v:
Mine (S21U, Exynos) has a bad battery life even after the March update. It was somehow acceptable ((5-6 hours Sot) before the Feb updates, but now is mediocre (max 4 h SoT). Stand by is ok, but as soon as I turn on the screen it drops 1% for every 3-4 minutes and this with many limitations (medium brightness, bluetooth off, location off, autosync off, 60 Hz, FHD+, dark mode, most of the apps restricted in the background, WiFi OR 4G). I suppose that if i turn everything on, as some of you do, I would get max. 3 h SoT per charge. I tried even to factory reset and manually install each app, the only back up was from Google Drive for WhatsApp. What should I do?
[Samsung Galaxy S21 Questions] joakimbo:
I've got the same as you. I've also tried factory reset. I think this is how it's suppose to be really.. I also had better battery before all this updates tho.
[Samsung Galaxy S21 Questions] Crokas:
Hi. S21 exynos fresh phone. Same options and usage as my, say old Huawei P30, and it doesn't last even as long. At the end of the work hours battery struggles.. I like the phone but at the moment battery is weak part..
[Samsung Galaxy S21 Questions] russellcausier:
P30 Pro is a fantastic phone remember having it thinking do I really need to upgrade from this phone it was that good!!and still upgraded ha
[Samsung Galaxy S21 Questions] Crokas:
And only problem with my S21 is SOT. Stabdy drain is negligible.
[Samsung Galaxy S21 Questions] joakimbo:
To all people with base S21 Exynos: Do you experience excessive battery drain on mobile data? I've tried troubleshooting this for weeks. Some are saying they get awesome battery life, others says it's garbage.

Ive tried factory reset. Tweaking settings etc, but no matter what, when not connected to WiFi, the battery drain is like 3x worse than any previous phone when on mobile data.
[Samsung Galaxy S21 Questions] Levisaurus:
For me the battery life is fine if i switch it to use 3G, if i switch it to LTE then the standby drain is horrendous
[Samsung Galaxy S21 Questions] phil_666:
Hello

Every night i put my S21 on airplane mode and i lost 1 % for all the night -I think it's pretty nice.
[Samsung Galaxy S21 Questions] joakimbo:
Airplane mode, of course. It's on LTE exynos that has this problem. I hope everyone with this model can report the issue in Samsung members app.
[Samsung Galaxy S21 Questions] joakimbo:
Have people given up on this issue? I'm still not getting more than 4 hours SOT over 24 hours with 50/50 LTE and Wi-Fi. Are you pleased with the S21 (Exynos) battery life?

Spoiler content hidden.
[Samsung Galaxy S21 Questions] blinkin:
Same here. I'm waiting for the next update, if it's not gonna improve anything I'll probably sell the phone and get back to my p30 pro
[Samsung Galaxy S21 Questions] mariomaxx:
Hi. Did you try to turn off 5G? My battery was horrible, did a lotta things but I think the one that made the difference was changing 5G to 4G. Now im having 8hs+ SoT
[Samsung Galaxy S21 Questions] blinkin:
Yes I'm on 4g without lte
[Samsung Galaxy S21 Questions] mariomaxx:
Well, like I said, I did a lotta things, I´ll list some of them

Usually I use SD Maid to disable apps that autostart after boot (I dont disable the app, I only disable the autostart)

I also did some debloat following this guide: https://xdaforums.com/t/debload-blo...agship-samsung-huawei-oneplus-phones.4238473/

Changed my screen from 120hz to 60hz

Turned off AOD

Disabled or uninstalled some Samsung apps that I dont use.

I bought the phone a week ago, the first 2 days battery was horrible, didnt get 3hrs SOT, after I did these chamges I went to get like I said more than 8hrs of SOT, with wifi and 4G always on.
[Samsung Galaxy S21 Questions] mariomaxx:
Tomorrow I´ll change my screen from 60hz back to 120hz to see if there will be any difference.

I hope you can solve this problem.
[Samsung Galaxy S21 Questions] blinkin:
Thanks a lot and keep us updated. I'm most probably not gonna waste any more time trying to fix this. If I buy a flagship phone, I just want it to work as intended and not disable functionality that I paid for.
[Samsung Galaxy S21 Questions] mariomaxx:
Thats

That's true, sadly with Samsung that's not so easy. I came from a Pixel 4Xl, great battery life, the last Samsung I had was a Galaxy S7, every Samsung I had, I had to disable, debloat and change things to get a good battery life, specially with the normal ones, the ones that are not Plus or Ultra (sorry, my english is horrible 😁)
[Samsung Galaxy S21 Questions] joakimbo:
Debloating is fine enough.. But switching to 60hz and turning off AOD to get proper battery life is just stupid. I'd rather buy a midrange phone then..
[Samsung Galaxy S21 Questions] mariomaxx:
Well, like I said, I did a lotta things because my battery life was horrible, now I'm starting to undo things one by one to see what was the real problem.

About AOD I don't like it so much, I think at day out distracts me a lot, and at night the light bother me. About 60hz or 120, I guess I might be a little bit because I don't see any difference either, in smoothness, maybe I'm looking at the wrong place.
[Samsung Galaxy S21 Questions] mariomaxx:
Today I got 6:45 hours SoT and I still have 25% battery left.

Now I'm gonna see what happens when I use it with 120hz refresh rate.