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Original topic:

Cell Standby/Android System/Google Play Services battery drain for Oreo on S7

(Topic created on: 28/06/18 18:22)
James0071
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Hi, 

 

I really like my S7 Edge. However as a direct result of installing the Oreo update I have significant battery drain. The drain is attributable to cell standby which sometimes reaches over 50% of battery use. It definitely did not do this on Nougat, ever. 

 

I have not added any apps to cause this problem and would really like a suggestion about what to do. I can't believe Safe Mode will have any effect as this has happened as a result of the upgrade, not rogue apps. I am not keen to do a factory reset either as I can't see the benefit. I have cleared the cache, removed some apps, restarted etc, turned off any battery hungry options in settings but to no avail.

 

If anybody could help me I would be very grateful. I believe it is a bug in Oreo or Samsung's altered version of Oreo but cannot prove either. I can't think what to do apart from find out how to downgrade back to Nougat, which I don't want to do.

 

Many thanks.

 

739 REPLIES 739
SmashMix
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@Fun831 @Nimkat-77 @nado4ilhas and others,

 

Knox was not triggered (=0) for me after these steps. Remember to flash only official files (NO custom or any other 3rd party cooking results or custom recovery etc.) and you will be good with Knox warranty.

Also, it is good to mention previously said: if you want to Samsung Pass, Pay, Health apps continue to work normally DO NOT flash bootloader (BL) other than you have with your official ROM version. I think that BL is not a part of this "cell standby battery drain" issue. But this is IMHO. I'm not geek. I'm just basic user as a majority of us is wanting to get rid of this ridiculous problem. I used instructions from internet to flash etc.

So, my advice will be to flash only a fresh modem/radio module (CP). I flashed EREO.

And few more things which is very important to remember!!! Always check:

1. G93(0/5)FXXU2(!)XXXX: Do you have "number 2" in your current ROM version? Is it also in the ROM where from you are going to flash that modem etc.? This number stands for "loader" and it's important to stay on same version. If you have "1" in your current OS and will flash the version with "2", I will not be able to go back on "1" (someone is saying that you will lose your IMEI).

2. Which model you have G930F (S7 flat) or G935F (S7 edge)?! Be focused when you are downloading the files to flash that them are really for YOUR model!

3. Got files? Now it is time to insure that your files are good (not got broken while downloading process). Use for example WinMD5 tool to see checksum of files and compare them to ones on source you downloaded files from.

4. Odin version? I used 3.13.1. On Russian forums it is been said that this version is suitable for flashing current versions of ROM files. Flashing instructions you can find easily from internet.

 

Files for G930F can be found in post above.

Files for G935F:

CP: https://androidfilehost.com/?fid=11050483647474827874

BL (which I'm not recommending you to flash): https://androidfilehost.com/?fid=11050483647474827870

 

And last, but not least: You are flashing any files and doing anything with your phone at your own risk! I'm not responsible if you brick your phone in result of these manipulations. Recheck everything before hit "Start" button in Odin.

nado4ilhas
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These 2 files, solved the problem with cell standby?

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MikeyMike
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I only flashed CP file (modem) and have no cell standby drain anymore. I used my phone on 4G only the last 3 hours....

Screenshot_20180702-165940_Settings.jpg

 

Screenshot_20180702-165945_Settings.jpg

 

 

 

VSiam
Explorer
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Guys, you don't HAVE to flash the fixed modem. If you not in a hurry or not sure just wait for OTA - it's matter of weeks, I believe.

Also keep in mind if you flash new modem you will NOT get any OTA updates until you revert original modem back or flash full firmware.

 

And yes, seems cell standby bug is fixed. :smileylol:

srg-b
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good luck waiting for samsung to patch a non-flagship device :smiling-face:

KornelB
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@srg-b wrote:

good luck waiting for samsung to patch a non-flagship device :smiling-face:


I totally agree with Srg-b, I have the same Baseband and Build as Rezakho and I have already contacted Samsung 3 times now, even talked to the representant of the top management... their answer is "there were no reports on such issue in Romania, so this is the first time a user reported such situation".

 

They have asked me to leave the phone in their service for them to be able to further study the issue, which I will actually do,  so I have to tottaly agree that there will be no patch soon.

 

I will keep you guys informed but as I said before, it looks to me that they either don't know what they are doing or they are just trying to cover up for the faulty software that they are pushing into people's phones. 

 

VSiam
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@srg-b, @KornelB - Since allegedly fixed firmware is already in the wild for TW & HK regions, there is no reasons to worry about OTA for other regions. Or it is? Moreover, ERF4 is AFAIK 4th public release of Oreo for S7. First in May was for BTU only and gets bootloop, then second fixed went global, 3rd EREM become global too (current latest) and now started ERF4.

 

But if you want to try new build right now, you are free to flash BL/CP files with Odin, links for G930F(D) and G935F(D) are already posted in this thread.

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KornelB
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@VSiam wrote:

@srg-b, @KornelB - Since allegedly fixed firmware is already in the wild for TW & HK regions, there is no reasons to worry about OTA for other regions. Or it is? Moreover, ERF4 is AFAIK 4th public release of Oreo for S7. First in May was for BTU only and gets bootloop, then second fixed went global, 3rd EREM become global too (current latest) and now started ERF4.

 

But if you want to try new build right now, you are free to flash BL/CP files with Odin, links for G930F(D) and G935F(D) are already posted in this thread.


@VSiam I have the EREM right now as you can see from the pic, I would like to try the new ERF4 but I'm not so good with that software stuff man 😁 and besides that I really don't understand why the Samsung representative in my country (Romania) is denying that they have encountered the same issues up till now, that can only mean that they are covering up. 

 

So what I will do, I'll submit my S7 flat to their service,  as they've  requested, not before making screen shots of everything that I can regarding the software version ... and see what they'll have to explain when they will check what they are now stating as "never been reported here". If they will fix the issue I hope I'll be able to identify what they did, but if they won't, I'll make sure that this entire sarrade that they are pulling goes public, and I mean public, TV, online you name it ... even if I'll have to pay for it I sware I'll do it ! 

 

I'm sick and tired of that bull man, first they have wasted my time going to the service where they have replaced the battery and the mother board, which didn't helped at all !!! Than they are now asking me to submit the phone once again to "further check the issue"... come on !!! Screenshot_20180704-000232_Settings.jpg

 

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gozoferi
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I don't know... I already have this update (actually I updated Nougat directly to this version a few days ago) and still cell standby is by far the leading battery drainer...

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VSiam
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Just flashed Bootloader and Modem for my S7 G930F (flat) from latest G930FXXU2ERF4:

https://androidfilehost.com/?fid=11050483647474827867

https://androidfilehost.com/?fid=11050483647474827872

Will report next week.

Of course will update to full firmware when it will out for OXA multi region. :smileylol:

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Nimkat-77
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guys my rom is for english and i have batrry drain so for fix this i must flash just AP and CP file with odin?

please give more about this

who flashid cp an ap file and cell stanby bug is fix?

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acsicsa
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@VSiam wrote:

Just flashed Bootloader and Modem for my S7 G930F (flat) from latest G930FXXU2ERF4:

https://androidfilehost.com/?fid=11050483647474827867

https://androidfilehost.com/?fid=11050483647474827872

Will report next week.

Of course will update to full firmware when it will out for OXA multi region. :smileylol:


These are the files that I flashed.

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nado4ilhas
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these files work with this rom? 

 

G930FXXU2EREM

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acsicsa
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Yes. This the current version that I have:Screenshot_20180701-232446_Settings.jpg

 

 

 

Rezakho
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@acsicsa wrote:

Yes. This the current version that I have:Screenshot_20180701-232446_Settings.jpg

 

 

 



Hi body, 

Such a great imrovement :smileywink:

I want to try your experience

Could You give more information please...

Have you just flash CP and BL in Odin?

Did you tick any special item?

Screenshot_20180702-104504_Settings.jpg

 

(This is my software version, the only difference with yours is "Baseband Version"

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Fun831
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Does it work with S7 Edge?Screenshot_20180702-113605_Settings.jpg

 

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acsicsa
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@VSiam wrote:

Just flashed Bootloader and Modem for my S7 G930F (flat) from latest G930FXXU2ERF4:

https://androidfilehost.com/?fid=11050483647474827867

https://androidfilehost.com/?fid=11050483647474827872

Will report next week.

Of course will update to full firmware when it will out for OXA multi region. :smileylol:


Guys, the only thing what I did is that I flashed 2 files with Odin the same way when you install a firmware. I'm talking about the 2 files that are here in the quoted messages from VSiam

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Sylva1n
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@James0071 wrote:
Hi, which carrier are you on and how did you access the carrier settings? I'm on Vodafone UK and can't see how to access them. Thanks.

@I'm in France, @ SFR. I accessed it because my carrier has an app which allows me to suscribe/unsuscribe options and get your invoices etc., but most likely your carrier has a website to log on to as a customer.

 

After a few days without 4G Call, I can say it's better, but still not very good.

 

Screenshot_20180629-095942_GSam Battery Monitor.jpg

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towaie
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Same here with galaxy s7 edge sprint
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Algus
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Cell standby drain is huge on my S7 flat with latest official Oreo updates. 

 

Screenshot_20180630-171823_Settings.jpg

 

See screenshot attached.

 

Samsung, please fix.

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KornelB
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The Samsung representative in my country is a total joke (Romania), after they asked me to reset the phone to the factory settings, which of course didn't helped, they checked the phone online via Smart Tutor, which didn't helped either and eventually asked me to go to one of their service shops where they have replaced, get ready for this: the S7 flat's MOTHER BOARD AND BATTERY !!! 

 

That happened last Thursday. Since then, I'm getting 5 hours more on my new battery, which is normal regarding that fact the old one was one and a half years old, but I'm experiencing the same issue with the Cell Standby using between 25 and 35 percent of my battery. 

Even when the phone is not in use during the night, I'm getting a 20% drainage. Yesterday for example, when I went to sleep the phone had 20 % battery and when I woke up 7 hours later I found it dead.

 

So, that makes it clear, they either don't have a clue of what they are doing or they are just trying to cover up for their software *****up, in any case one thing is sure, this is not a hardware issue.

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