Exynos Galaxy S10 affected by severe idle battery drain, here's a temporary fix

Exynos Galaxy S10 affected by severe idle battery drain, here's a temporary fix
Update: We have reached out to Samsung and the company has issued an official statement on the matter:

"Samsung is aware of the issue and will be releasing a software update to resolve this as soon as possible. We recommend all Galaxy S10 users to keep their software updated with the latest version."

Samsung's in-house Exynos chipsets have never had the reputation of being exceptionally power-efficient, and this year's Galaxy S10 models further solidify this. We recently compared the Exynos and Snapdragon versions of the Samsung Galaxy S10, and not only did the Snapdragon 855-powered model come on top in our benchmark tests, but it also lasted almost an entire hour longer than its Exynos counterpart in our custom battery test.

But the problems don't end there. Over the past couple of weeks, user reports from all over the web have highlighted a number of bugs affecting all Galaxy S10 models that further confound battery life on Samsung's latest flagship phones. The first is the so-called "proximity sensor bug," which causes the phone to mistakenly turn on its screen while in a pocket or a bag. The current solutions include disabling the "Lift to Wake" and "Tap to Wake" functions on the Galaxy S10, as the phone seems to be confused by motion and accidental touches. User reports seem to indicate that, when carrying the phone in your pocket with its screen turned to your leg, the Galaxy S10 may confuse accidental presses against your thigh as screen taps and consequently turn on the display. The "Lift to Wake" bug seems to be triggered by random motion, which the phone may interpret as intentional.

But there's another, arguably more worrisome, bug that affects the Exynos-powered versions of the Samsung Galaxy S10. Many new S10 adopters have been complaining about severe idle battery drain on their handsets. Users over at XDA and Reddit have been comparing battery life results for their Exynos Galaxy S10 models, putting them through various tests, and have been able to figure out what's causing the severe idle battery drain for some users. Yes, only some people seem to be hit hard by less-than-stellar battery life on their Galaxy S10s, while many others have reported adequate screen-on time numbers.

By running CPU Spy, XDA forum users have been able to determine that making or receiving VoIP calls triggers a bug in the Exynos version of the Galaxy S10 that prevents the phone from entering deep sleep when idle

By running CPU Spy, XDA forum users have been able to determine that making or receiving VoIP calls triggers a bug in the Exynos version of the Galaxy S10 that prevents the phone from entering deep sleep when idle


The bug has been confirmed to be caused by making and receiving VoIP calls on the Galaxy S10, and it is affecting only the Exynos-powered versions of the phone. The bug is triggered by either making or receiving VoIP calls, such as in WhatsApp, Viber, Facebook Messenger, or any other app that supports the feature, and prevents the phone from entering a deep sleep state when in standby. This bug is also said to be triggered by an issue with the proximity sensor and will prevent the phone from entering deep sleep until it's restarted. This means that the CPU keeps ticking at a higher-than-needed frequency even when the phone is idle. Making or receiving another VoIP call, even including voice messages, will trigger the bug again.

The only solution that has currently been found to fix the issue, is restarting your Galaxy S10 after every VoIP call. Note that making and receiving regular calls does not trigger this bug. That's why many people who don't use VoIP have had much better battery life than those who do.

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60 Comments

1. Zylam

Posts: 1787; Member since: Oct 20, 2010

They need to just stick to the SD chips. Samsung's inhouse chips are garbage. They need to pony up and pay the royalties instead of stiffing the people who pay top dollar for an inferior chip. (Yes yes iPhone and Apple sucks, of course, death to Apple and iSheep, thank you)

3. Cat97

Posts: 1718; Member since: Mar 02, 2017

Actually the S7/Edge Exynos was way better than the Snapdragon 820 and 821. Qualcomm took the lead with the 835 (which was so-so) the 845 was very good and the 855 looks to be great too.

5. AbhiD

Posts: 564; Member since: Apr 06, 2012

Snapdragon was trash only with 810. Even 820/821 was a match or better than Exynos.

14. Mike88

Posts: 88; Member since: Mar 05, 2019

The processor has no issue at all.... It's due to their current tie up with Indian and Chinese govt which was trying hard to monitor voip calls too but whatsapp and viber denied to cooperate. So they had a tie up with Samsung to provide these calls, these exynos devices record user calls temporily and send them to govt servers in India and China. Google and Microsoft are doing the same... It just needs some research and you can decode the plans of some evils

23. Boast_Rider

Posts: 529; Member since: Sep 14, 2017

No, it wasn't. The 820/821 was significantly worse than the 8890 in battery life and performance. This is from the anandtech review, which states that the exynos is the only version worth buying(they tested both extensively): "I think the only way to really justify the difference here is if you can get the Exynos 8890 version, which isn't necessarily an indictment of the Snapdragon 820, but rather the attention to detail that the Exynos variant receives." From there, Qualcomm matched the 8895 with the 835, and absolutely crapped on the 9810 and 9820 with their 845 and 855. But the fact remains that the Exynos chips used to be better.

15. lallolu

Posts: 729; Member since: Sep 18, 2012

835 was not so-so. It was better than the SD845. This is very obvious in battery efficiency.

7. AbhiD

Posts: 564; Member since: Apr 06, 2012

Exactly... Samsung needs to own up that their Exynos processors suck. Hell, even Huawei seems to be making more progress with each iteration than Samsung. It's time Samsung switches to Snapdragon only for their flagship models. Last 2 years especially have been a disaster for Exynos. I stopped buying S series/Note series phones just because my country gets Exynos models(partly reason was their skin too). Switched to OnePlus.

11. slashas

Posts: 120; Member since: Jul 17, 2017

Same here not looking at Samsung phones until it will employ Exynos chips... Whole Europe is threated as 3rd world with Exynos chips, why not deliver US with Exynos and Europe with SD... We pay much more for the same device compared to the US prices.

40. Blazers

Posts: 712; Member since: Dec 05, 2011

That answer is obvious. Only SD supports Verizon and Sprint, since Samsung doesn't want to pay Qualcomm. As why Europe pays more, blame your high VAT.

8. ph00ny

Posts: 1985; Member since: May 26, 2011

This is their real second gen exynos where custom core was used. They should continue with the development of the Exynos but should probably get a new GPU setup instead of relying on Mali.

2. drunkenjay

Posts: 1633; Member since: Feb 11, 2013

mines fine (s10+ exynos). i heard its only some s10 models (s10e) but i can be wrong.

4. Cat97

Posts: 1718; Member since: Mar 02, 2017

First things first: an 8nm chip (latest Exynos) is around 15% worse at power consumption compared to a 7nm (latest Snapdragon), by manufacturing process and by physics laws. Combine this with the proven better modem efficiency of the Snapdragon, and you get a rough picture on why the Exynos S10 battery drain is overall worse than the Snapdragon. These "bugs" will never be solved, they can be somewhat mitigated with some tips & tricks, but never solved fundamentally.

6. ph00ny

Posts: 1985; Member since: May 26, 2011

Except it's hard to compare 8nm to 7nm because they're no longer apples to apples in terms comparison since underlying technology matters as much as the actual measurement and not every aspect of the soc is manufactured with the same 8nm/7nm measurement

9. srattan

Posts: 7; Member since: Oct 23, 2014

Bixby and Exynos, both are genetically flawed products from Sammy's farm. Earlier they get rid of these, better poised Samsung will be.

10. darkkjedii

Posts: 30783; Member since: Feb 05, 2011

Get this fixed Samsung, and fast. Screw the temporary fix.

12. Jimrod

Posts: 1605; Member since: Sep 22, 2014

I can say now the Qualcomm SD855 variant of the S10e isn't amazing either. I finally made the jump from Apple to Android this weekend and the S10e's battery sucks compared to my three year old iPhone SE (and the slightly depleted battery was one reason I wanted a new phone!). I've heard all the endless arguments about how Android phones have amazing large batteries and battery life compared to iPhones and maybe it needs a few days to settle but between taking it off charge at 100% at 8:15am this morning, having a shower and leaving for work at 8:35am it had dropped to 98%. WTF? Now my Android loving friends say that's normal? They've changed their tune. It was idling, had been restarted an hour previous. My iPhone SE was taken off charge at the same time at 98% and has been sitting (mostly unused) since, it's at 98% still at 11:33am. Not impressed so far... Hoping it gets better!

25. Vancetastic

Posts: 736; Member since: May 17, 2017

I don’t know that it will get better. My iPhones have always gotten way better standby time than any android phone I’ve had. In actual use, it’s pretty much a wash.

26. Jimrod

Posts: 1605; Member since: Sep 22, 2014

Cheers for the info! It's holding on reasonably well as the day progresses, with light use I'm now at 86% at 1:25pm (the iPhone still hasn't lost anything! :D ), if it carried on at that initial rate I'd be very concerned! The phone itself is very good, still some things I prefer about iOS but I'm sure I'll adjust eventually...

27. wickedwilly

Posts: 538; Member since: Sep 19, 2018

iPhones always have a good standby time, however, Apples algorithm that shows remaining time, is heavily biased to showing less use at high battery levels, giving a false appearance to some extent. The s10+ in my first few weeks of use has improved on previous S series phones. In terms of actual use comparable Android phones have lasted longer than iPhones, in many cases significantly, that lead is even wider with the arrival of the S10 as battery tests are clearly showing.

28. darkkjedii

Posts: 30783; Member since: Feb 05, 2011

Same here, iPhone standby time is awesome. My note 9 gets better usage time, my Max gets better standby time.

31. ShadowWarrior

Posts: 152; Member since: Aug 08, 2017

I'm getting decent battery life so far on the S10e but you have to understand that Androids don't usually have good standby times. Conversely just because iPhones have good stand by times doesn't mean that they don't deplete quickly when you use them. Androids don't deplete as fast when using them.

13. maherk

Posts: 6678; Member since: Feb 10, 2012

I can confirm this. I was barely getting 3 hrs of sot until I started restarting my phone, and I never knew what was the cause of the problem until I read this article. It's been almost a month since I had this phone, and apart from the 1st update that I received on day one, Samsung has yet to address the glitches and issues affecting this device. I guess I am gonna ditch this for the P30 Pro.

16. bucky

Posts: 3771; Member since: Sep 30, 2009

This has been an Android issue for as long as i can remember.

17. ECPirate37

Posts: 290; Member since: Jul 14, 2011

What is this "consecuently" you speak of and where may I buy it? I actually googled to make sure that wasn't a British way of spelling consequently. I actually read it as "con-SEC-you-int-lee" and that sounds sexy. I want to drop that word randomly on people. But what should I define it as?

18. chris2k5

Posts: 219; Member since: Nov 17, 2012

Snapdragon S10’s are experiencing same issue

19. Dajan0508

Posts: 6; Member since: Mar 11, 2019

I heavily used viber and whats app, why don't i experience this issue? Im in philippines and have been using the sq0+ exynos since march 1. PA have posted so many bs about the s10

20. maherk

Posts: 6678; Member since: Feb 10, 2012

Just because it doesn't affect you, it doesn't mean it's not happening to others. Me and my wife both have an S10+, I am facing this problem while she isn't.

22. Dajan0508

Posts: 6; Member since: Mar 11, 2019

Well, me and my sister and my girlfriend and my in law plus 2 of my friends aren't affected

24. maherk

Posts: 6678; Member since: Feb 10, 2012

Lucky you

21. yyanev

Posts: 1; Member since: Mar 25, 2019

I have S9+ exynos model with One UI and I have the exact same problem.

* Some comments have been hidden, because they don't meet the discussions rules.

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