Hello guys, lets put in this topic everything about any kind of custom roms for the Galaxy S5 G900FD, I think will be comfortable for everybody as at this moment no special section in this forum for this device:fingers-crossed:
Let's start.. I found two custom roms for this device (links to original topics)
1) SVA ROM (download of rom available after donation to the author)
2) best2all Light ROM (free)
Keep trying to find more...
3) New one made by aoprea
So gentlemen, for now it looks available only 3 ROMs...
There is GERISROM too by gsdsrock
Any news about a new custom rom ? Somethink with mod's ?
Has anyone tested any rom?
Yes, I have tried the SVA ROM and I can confirm that it is very good.
ncai97o said:
Yes, I have tried the SVA ROM and I can confirm that it is very good.
Click to expand...
Click to collapse
hi... i got problem with my mobile after i flash SVA rom on my s5 duos battery life suck
android system suck battery life on standby
now i flash back to stock rom still have this issue any fix plz need help
i know no body will listen:crying:
mtayabkk said:
hi... i got problem with my mobile after i flash SVA rom on my s5 duos battery life suck
android system suck battery life on standby
now i flash back to stock rom still have this issue any fix plz need help
i know no body will listen:crying:
Click to expand...
Click to collapse
The phone is used by my wife and we all know how much women like to talk on mobile phone, don't we!?
I have installed SVA ROM v.4.5 on this phone following strictly instructions on SVA's website.
The phone's battery has a life of about 1.5-2 days between chargings and my wife always or almost always put the phone on charging when the battery is under 5%.
My wife does not play any game on it.
The phone is used for endless talking, listening music, skype, yahoo, gmail and some photos.
ncai97o said:
The phone is used by my wife and we all know how much women like to talk on mobile phone, don't we!?
I have installed SVA ROM v.4.5 on this phone following strictly instructions on SVA's website.
The phone's battery has a life of about 1.5-2 days between chargings and my wife always or almost always put the phone on charging when the battery is under 5%.
My wife does not play any game on it.
The phone is used for endless talking, listening music, skype, yahoo, gmail and some photos.
Click to expand...
Click to collapse
before i flash this rom i got 2days standby time.
what i used most call,music but now android system suck batty life on standby.
Skype problem
Gents HAPPY NEW YEAR!!!! I found one problem with Skype app. I don't know how but this app killing my battery from 100% till 0% within 8 hours in standby mode. So I delete this app and battery live became very good again, almost two days. Just for information.
mtayabkk said:
before i flash this rom i got 2days standby time.
what i used most call,music but now android system suck batty life on standby.
Click to expand...
Click to collapse
dowload latest fw from sammobile and flash it using odin.
wipe data factory reset and you will be ok. dont mess with the phone unless you know what to do.
dj_tselis said:
dowload latest fw from sammobile and flash it using odin.
wipe data factory reset and you will be ok. dont mess with the phone unless you know what to do.
Click to expand...
Click to collapse
hi. i flash it back to stock 4.4.2 wipe data done! but still android system sucking battery life i didnt add google account or samsung but still battery life worse on standby
mtayabkk said:
hi. i flash it back to stock 4.4.2 wipe data done! but still android system sucking battery life i didnt add google account or samsung but still battery life worse on standby
Click to expand...
Click to collapse
Maybe you have a faulty battery.
mtayabkk said:
before i flash this rom i got 2days standby time.
what i used most call,music but now android system suck batty life on standby.
Click to expand...
Click to collapse
i dont think its a battery problem battery drain because of android system taking 50% battery or screen on just 10%
please tell me a way to fix i will try others method too
mtayabkk said:
i dont think its a battery problem battery drain because of android system taking 50% battery or screen on just 10%
please tell me a way to fix i will try others method too
Click to expand...
Click to collapse
If I were in your situation I would try the following:
1. put another battery in the phone but with the same firmware which is draining your original battery to be sure it is not a faulty battery;
2. flash another original firmware and after that install prefered apps one by one with some time between them in order to see how much of the battery it use.
Good luck!
5.0 Lolipop firmware is on :
Model: SM-G900FD
Model name: GALAXY S5
Country: Russia
PDA: G900FDXXU1BNL9
On SAMMOBILE !
Any root method for Lolipop ?
ncai97o said:
If I were in your situation I would try the following:
1. put another battery in the phone but with the same firmware which is draining your original battery to be sure it is not a faulty battery;
2. flash another original firmware and after that install prefered apps one by one with some time between them in order to see how much of the battery it use.
Good luck!
Click to expand...
Click to collapse
ok i will try 2 method :good:
---------- Post added at 10:22 AM ---------- Previous post was at 10:09 AM ----------
xtmzone said:
5.0 Lolipop firmware is on :
Model: SM-G900FD
Model name: GALAXY S5
Country: Russia
PDA: G900FDXXU1BNL9
On SAMMOBILE !
Any root method for Lolipop ?
Click to expand...
Click to collapse
Downloading :highfive: check rooting method on s5 root thread
..
xtmzone said:
5.0 Lolipop firmware is on :
Model: SM-G900FD
Model name: GALAXY S5
Country: Russia
PDA: G900FDXXU1BNL9
On SAMMOBILE !
Any root method for Lolipop ?
Click to expand...
Click to collapse
Downloading too I will review it and make a short summary when I have the time to install it..
S5 G900FD dual sim
im facing a problem, when i use sim 1 4g and sin 2 gsm, call out will sudden cut line and showing both line alike restart from airplane mode to normal mode.... anybody can help me ?? I've tried 2 of the s5 dual sim diff model same problem....
Related
Hello , so i got my new phone galaxy note3 and i updated it to the new android 4.4.2 and it seems it drains the battery like way to fast,
in the older version of 4.3 it didnt happen at all this is so obvious that something its the Android System takes to much battery its always on top can anybody help me to root to the original stock rom of android 4.3 with all working functions? Or is any update coming to the note3 to fix this ? i know that the warranty will go off but i dont need it anyway all i want is battery !
fuad541 said:
Hello , so i got my new phone galaxy note3 and i updated it to the new android 4.4.2 and it seems it drains the battery like way to fast,
in the older version of 4.3 it didnt happen at all this is so obvious that something its the Android System takes to much battery its always on top can anybody help me to root to the original stock rom of android 4.3 with all working functions? Or is any update coming to the note3 to fix this ? i know that the warranty will go off but i dont need it anyway all i want is battery !
Click to expand...
Click to collapse
There is no unusual battery drain in 4.4.2 if not factory reseted do it, it will fix your problem, u can't go back to 4.3 now.
If you do a google search you will see there are many many users affected by the battery drain bug. Im yet to find a fix.
Hey guys i have a samsung galaxy s4 on android 4.4.2 kitkat and i am not happy at all with the kitkat update since it has ruined battery life and is causing many other problems like lag and overheating
So i want to downgrade to the stock 4.2.2. I have never rooted my samsung galaxy s4 and i am still unrooted.
I know knox will be set to 0x1 after downgrading but i do not care about it as triangle away supports galaxy s4 now .
So here is what i want to know
If i download the proper 4.2.2 firmware from sammobile according to my country(India) and install it via odin then will the process work? and if it is the right procedure does it require root ?
Is there any chance that my phone can get bricked because of knox ?
and how should i take backup of efs in case of a possible imei error ?
I know how to downgrade i9505 but i9500 Im not sure about it I never tested it out
I think you can downgrade successfully, I have a thread about how to downgrade from 4.4.2 to 4.3 but its for i9505 check my profile threads
You can downgrade successfully if you follow my guide, but you will lose wifi of maybe imei
So you can solve 4.3 wifi problem by downloading 4.3 kernel
You can use the same way to downgrade from 4.3 to 4.2.2
And for how to backup your imei you will need a rooted device !!
There some apps that backsup imei
Just look for your phone model "gt-i9500"
And you can backup you system starting from imei by having custom recovery like CWM and do Nandroid
And Knox will be tripped
Downgrade or Install Custom ROM
tdssmarty16 said:
Hey guys i have a samsung galaxy s4 on android 4.4.2 kitkat and i am not happy at all with the kitkat update since it has ruined battery life and is causing many other problems like lag and overheating
So i want to downgrade to the stock 4.2.2. I have never rooted my samsung galaxy s4 and i am still unrooted.
I know knox will be set to 0x1 after downgrading but i do not care about it as triangle away supports galaxy s4 now .
So here is what i want to know
If i download the proper 4.2.2 firmware from sammobile according to my country(India) and install it via odin then will the process work? and if it is the right procedure does it require root ?
Is there any chance that my phone can get bricked because of knox ?
and how should i take backup of efs in case of a possible imei error ?
Click to expand...
Click to collapse
Hey dude,
I don't really understand how the s4 lags - did u try resetting the device?
the battery life is fine with the latest update.
Overheating is still there in i9500 & also it cools down rapidly - I guess its a HW design. Hope it wont be fixed.
I was annoyed with the overheating issue & now i am used to it. It heats while using 2G or 3G Internet & playing games.
Using regular apps it doesn't heats up & now i am okay with it.
Regarding the downgrade, frimware from sammobile will work fine. You will have to install via odin.
no your phone wont get bricked cos of knox - I suggest you to follow a video tutorial and do the downgrade.
But I recommend you to try a custom rom such as Omega, Hassan etc
In my experience the these roms are very good on battery and performance. Pls do note these roms (Omega, Hassan) are based on samsung stock rom.
If you still want to downgrade, I would suggest you to take it to the service center guys & they will do it for free.
Hope this helps!! :good:
Yeah it mostly gets heated while playing games and using chrome
Though i can still live with the heat because eventually i will get used to it after some time
But the lag is killing me
My phone shows lags while entering and leaving apps and camera and gallery too and it was not lagging before on 4.2.2
Also i have experienced significant battery drag
While using the internet it falls of by 1 percent every two minutes
Is this kind of battery drop normal ?
I am really missing the old firmware so i think i am gonna go to samsung and get it downgraded from there
Thanx for the sugesstion bro
tdssmarty16 said:
Yeah it mostly gets heated while playing games and using chrome
Though i can still live with the heat because eventually i will get used to it after some time
But the lag is killing me
My phone shows lags while entering and leaving apps and camera and gallery too and it was not lagging before on 4.2.2
Also i have experienced significant battery drag
While using the internet it falls of by 1 percent every two minutes
Is this kind of battery drop normal ?
I am really missing the old firmware so i think i am gonna go to samsung and get it downgraded from there
Thanx for the sugesstion bro
Click to expand...
Click to collapse
I think will be not easy. You voided ur warranty when u downgraded (KNOX:0x1). No service centers will fix it (in theory) :highfive:
No Performance Lag & Good Battery Life
tdssmarty16 said:
Yeah it mostly gets heated while playing games and using chrome
Though i can still live with the heat because eventually i will get used to it after some time
But the lag is killing me
My phone shows lags while entering and leaving apps and camera and gallery too and it was not lagging before on 4.2.2
Also i have experienced significant battery drag
While using the internet it falls of by 1 percent every two minutes
Is this kind of battery drop normal ?
I am really missing the old firmware so i think i am gonna go to samsung and get it downgraded from there
Thanx for the sugesstion bro
Click to expand...
Click to collapse
Hey bro,
In my experience with the S4 on Stock ROM I never experienced a lag.
Please check on the settings - switch off the gimmicky features such as Air View, Air Gesture, S Beam, Air Gesture, Motion, Palm Motion etc etc.
Settings --> Connections Tab --> NFC, S Beam, Nearby devices, Screen Mirroring
Settings --> My Device -->(scroll down) motions & gestures, smart screen, air view
Turn locations off
Check the battery graph - see which app consumes more
I had this issues when these features were on.
The phone will be always hot, battery was draining like 1 % for 1 to 2 mins.
There is no lag with camera and gallery.
Battery drag is bit similar that I lose 1% for every 3 to 4 mins on 2/3G Internet. But on Wifi battery is solid.
In my opinion battery is very solid in S4.
The latest firmware is very stable. The performance has increased from old firmwares.
If you hv rooted the device, and got custom recovery just try a custom rom.
Okay i think it would be good to try the custom rom
So i am gonna try that and see what happens
Joku1981 said:
I think will be not easy. You voided ur warranty when u downgraded (KNOX:0x1). No service centers will fix it (in theory) :highfive:
Click to expand...
Click to collapse
Bro my warranty is still intact
I did not downgrade it yet because i dont know the correct method to do it
tdssmarty16 said:
Hey guys i have a samsung galaxy s4 on android 4.4.2 kitkat and i am not happy at all with the kitkat update since it has ruined battery life and is causing many other problems like lag and overheating
So i want to downgrade to the stock 4.2.2. I have never rooted my samsung galaxy s4 and i am still unrooted.
I know knox will be set to 0x1 after downgrading but i do not care about it as triangle away supports galaxy s4 now .
So here is what i want to know
If i download the proper 4.2.2 firmware from sammobile according to my country(India) and install it via odin then will the process work? and if it is the right procedure does it require root ?
Is there any chance that my phone can get bricked because of knox ?
and how should i take backup of efs in case of a possible imei error ?
Click to expand...
Click to collapse
i have make downgrade to my phone i9500 form 4.4.2 to 4.2.2
with this firmware XFE-I9500XXUBMH1-20130927115211.zip
you can download form here >>> http://d-h.st/4bG
and wifi is ok and device is working so fine
but after i flash it's show the device is custom but i root it before
can u try it if you like
http://forum.xda-developers.com/showthread.php?t=2755184
Thanx for the information buddy
I will try to flash this firmware with odin
As I know...
tdssmarty16 said:
Hey guys i have a samsung galaxy s4 on android 4.4.2 kitkat and i am not happy at all with the kitkat update since it has ruined battery life and is causing many other problems like lag and overheating
So i want to downgrade to the stock 4.2.2. I have never rooted my samsung galaxy s4 and i am still unrooted.
I know knox will be set to 0x1 after downgrading but i do not care about it as triangle away supports galaxy s4 now .
So here is what i want to know
If i download the proper 4.2.2 firmware from sammobile according to my country(India) and install it via odin then will the process work? and if it is the right procedure does it require root ?
Is there any chance that my phone can get bricked because of knox ?
and how should i take backup of efs in case of a possible imei error ?
Click to expand...
Click to collapse
As I know, if you download an official firmware of samsung from sammobile, you can downgrade/upgrade your firmware without rooting, just flash via odin. Maybe you can uninstall KNOX first before downgrading, open KNOX mode and press menu and click uninstall KNOX. I hope this helps. Good Luck
Hi
I have a Samsung S4 I9500 with 4.4.2 official,some days ago I install Android 5.0.1 official, the rom is I9500XXUHOA7 from Russia with Odin 3.09, the installation was normally I use the option AP.
But i have the next problems:
- The screen of the phone too hot on top only with normal use without playing.
- The battery lasts much less.
Is there any way to return 4.4.2 or solve these problems
Thanks
Odin it back to 4.4.2 thats what I had to do wait for 5.1 to see if it fixes up these pesky bugs.
I believed im the only with top screen hot.
dirov said:
Hi
I have a Samsung S4 I9500 with 4.4.2 official,some days ago I install Android 5.0.1 official, the rom is I9500XXUHOA7 from Russia with Odin 3.09, the installation was normally I use the option AP.
But i have the next problems:
- The screen of the phone too hot on top only with normal use without playing.
- The battery lasts much less.
Is there any way to return 4.4.2 or solve these problems
Thanks
Click to expand...
Click to collapse
Check it here
http://forum.xda-developers.com/showthread.php?t=2265477
Battery & Gestures
I like the lollipop update except two things battery,something I think Sammy needs to address, second problem is that the Gestures are not fully working i.e scrolling when using stock browser. I've tried both Russian and Indian firmwares both same result. Anyone notice this or anything else?
Oh! dirov if you do downgrade make a backup & bk your imei. Report back how you get on, Good Luck!
:crying:
hi all i am from india i bought s7ed off ebay second hand.
seller said that its uk model which is also engraved in back, yately uk, its single sim.
software wise its android 7
baseband g935fxxu1dqaf
kernel 3.18.14-10273029
build nrd90m.g935xxu1dqaz
knox 2.7.1
i tried to install twrp thru odin but no its refusing to start i mean the phone is just showing samsung logo flashing. i am not able to switch it off, i can get only into download mode , i tried volume up thing thats also not working.
now if only way to get out is reflash stock rom, i am not sure which country rom. can i flash any rom , sammobile is down for maintainence till 12th.
should i keep phone plugged in to a charger so that battery does not run out.
what i have done:crying:
dheerpat said:
:crying:
hi all i am from india i bought s7ed off ebay second hand.
seller said that its uk model which is also engraved in back, yately uk, its single sim.
software wise its android 7
baseband g935fxxu1dqaf
kernel 3.18.14-10273029
build nrd90m.g935xxu1dqaz
knox 2.7.1
i tried to install twrp thru odin but no its refusing to start i mean the phone is just showing samsung logo flashing. i am not able to switch it off, i can get only into download mode , i tried volume up thing thats also not working.
now if only way to get out is reflash stock rom, i am not sure which country rom. can i flash any rom , sammobile is down for maintainence till 12th.
should i keep phone plugged in to a charger so that battery does not run out.
what i have done:crying:
Click to expand...
Click to collapse
Its not bricked.
If it's A UK device then download aUK firmware from Sam mobile and flash in odin. Then you'll be good to go.
riso123 said:
Its not bricked.
If it's A UK device then download aUK firmware from Sam mobile and flash in odin. Then you'll be good to go.
Click to expand...
Click to collapse
but will the battery hold , since its a 2 gb file and i have a slow connection here will take almost 10 hours to doenload firmware
also should i download android 6 or 7 firmware, actually i was trying to solve the s health knox trip issue.
re: firmware issues
dheerpat said:
but will the battery hold , since its a 2 gb file and i have a slow connection here will take almost 10 hours to doenload firmware
also should i download android 6 or 7 firmware, actually i was trying to solve the s health knox trip issue.
Click to expand...
Click to collapse
You need to odin flash the firmware even if it takes you 10hrs. to download it because
there is no other way to get your phone working properly and running like new.
Also if your knox is tripped there is NO way to "un-trip" it, it will stay tripped regardless
of which firmware you flash.
If the firmware was UK then you need to download UK firmware from sammobile or you
can find and download it from Updato. Here is a link to "Updato":
http://updato.com/firmware-archive-select-model
It doesn't matter if you flash Marshmallow 6 or Nougat 7 firmware, that's a personal choice.
Good luck, have a great day!
ohk thanks but my question remains regarding battery, its not switiching off , should i keep it pluged into the charger while i download or even if battery dies i can plug into pc and flash firmware later, and also it was factory unlocked phone as per seller there are many versions of uk like vodafone etc etc.
can i flash any even if its 6.0
re: battery
dheerpat said:
ohk thanks but my question remains regarding battery, its not switiching off , should i keep it pluged into the charger while i download or even if battery dies i can plug into pc and flash firmware later
Click to expand...
Click to collapse
It does not matter, you can always charge the battery anytime
you like, if you cannot turn the phone off just let the battery
drain and then before odin flashing firmware charge the
phone for about an hour.
Good luck,
Misterjunky said:
It does not matter, you can always charge the battery anytime
you like, if you cannot turn the phone off just let the battery
drain and then before odin flashing firmware charge the
phone for about an hour.
Good luck,
Click to expand...
Click to collapse
thanks to u
i am downloading the firmware(6.0) right now, i hope flashing 6.0 on 7.0 will not brick it. do let me know if otherwise
Misterjunky said:
It does not matter, you can always charge the battery anytime
you like, if you cannot turn the phone off just let the battery
drain and then before odin flashing firmware charge the
phone for about an hour.
Good luck,
Click to expand...
Click to collapse
THANK U MUCHHHHH
Following ur links not only i was able to download firmware superfast but also restore my phone:good:
i first downloaded vodafone 6.0 that failed, next i tried andorid 7.0 BTU which flashed well
as for knox tripped there is a thread on this topic where in thru build prop editor it can be reset for which root is reqired
any insight how do i root nougat to modify build prop i really need that s health sensors to work
dheerpat said:
THANK U MUCHHHHH
Following ur links not only i was able to download firmware superfast but also restore my phone:good:
i first downloaded vodafone 6.0 that failed, next i tried andorid 7.0 BTU which flashed well
as for knox tripped there is a thread on this topic where in thru build prop editor it can be reset for which root is reqired
any insight how do i root nougat to modify build prop i really need that s health sensors to work
Click to expand...
Click to collapse
Why not use Google Fit??
surfer3000 said:
Why not use Google Fit??
Click to expand...
Click to collapse
does it employs phones heart and oxygen sensor?
I am using exynos on N. Was getting ~6 hours SOT on MM, phone would last almost 2 days. After flashing nougat, only getting around 2-3 SOT and phone doesn't even last 1 day.
I am:
-not using any package disablers
-not using AOD
-I would say even usage of wifi/data
-all motion detection off, not very many apps doing background syncing (or so I think)
I have owned this phone for almost 1 year now, always fast charging everyday so my battery is probably very weak by now.
Should I:
1. Try flashing a custom debloated N ROM? (I've had people on here tell me they used ton of different N ROMs for months and they still went back to MM for longer battery life.)
2. Try flashing a custom debloated MM ROM?
3. Pay ~$70-80 to get a new battery?
For example I am considering flashing superman rom but not sure if I should flash mm or N.
I don't know how people are getting 8-9 hours SOT on nougat. If anyone could give advice that would be great.
Thank you.
Hi,
Since you're charging the phone everyday with fast charge and is using it for almost a year, then you have to keep in mind that the battery won't last as long as when you got the device.
You can however try to get around the aging of the phone by making use of less bloated ROMs and more battery efficient kernels, if you're not using Knox featured neither is using Samsung Pay, then since you're at the end of your warranty I highly recommend installing a custom ROM.
I do not think that the downgrade is a good solution, first because you won't be able to do it AFAIK, Samsung Knox prevents a system downgrade ever since the S4 IIRC. So unless you get a custom Marshmallow ROM that works for your current Nougat bootloader (which isn't impossible, I think most should run).
Personally in your situation I'd first try a clean stock install, if the problem persists I'd go for a Nougat ROM, because since you are installing a custom ROM, why not go for the latest and greatest instead of downgrading since you can get a good battery life on the Nougat ROM as well?
All the best,
~Lord
Sent from my Galaxy S7 Edge using Tapatalk
I'm as well having poorer battery life on Nougat than I had with MM, though 2-3 hours SOT seems to be too low.
On Nougat I get 5 hours SOT, while on MM 7 hours were the norm. Hopefully Sammy will release some update "soon" (lol, ok: somewhen...)
Anyway, what do you mean by downgrade not possible?
What happens when I flash a stock MM Rom through ODIN now, won't that work?
Downgrading to MM from Nougat works just fine by flashing official MM Rom via Odin.
I did it on my G935F because I'm using xposed which is not yet working in Nougat.
Hi,
Good to know that downgrade is still a possibility, I've read on another thread (don't remember where or when tho) that some users reported having Odin simply failing to flash a downgrade (IIRC was S6 MM downgrade to LP). Sorry for the misinformation .
All the best,
~Lord
Sent from my Galaxy S7 Edge using Tapatalk
GrippingSphere said:
Downgrading to MM from Nougat works just fine by flashing official MM Rom via Odin.
I did it on my G935F because I'm using xposed which is not yet working in Nougat.
Click to expand...
Click to collapse
Nice to here that u got successfull in downgrading... i also wana go back to MM..so should i also try?
majidshahab091 said:
Nice to here that u got successfull in downgrading... i also wana go back to MM..so should i also try?
Click to expand...
Click to collapse
It's really up to the phone's owner to decide. One can only suggest but everyone has its own reasons to choose either N or MM.
One thing i noticed during the downgrade, it's asking for your Google password so be sure to know it. It may also cause your phone to freeze during boot up, the solution for this is to go to Recovery and wipe data/factory reset and wipe cache. So be sure to backup first your data by using TB or synchronisation thru your Google acct or Samsung acct.
Also because S7 snd S7e have no removable batteries, be sure you know how to go to Download or Recovery mode without first turning off the phone.
GrippingSphere said:
It's really up to the phone's owner to decide. One can only suggest but everyone has its own reasons to choose either N or MM.
One thing i noticed during the downgrade, it's asking for your Google password so be sure to know it. It may also cause your phone to freeze during boot up, the solution for this is to go to Recovery and wipe data/factory reset and wipe cache. So be sure to backup first your data by using TB or synchronisation thru your Google acct or Samsung acct.
Also because S7 snd S7e have no removable batteries, be sure you know how to go to Download or Recovery mode without first turning off the phone.
Click to expand...
Click to collapse
Ok thanks
If doing a downgrade I would strongly recommend a factory resets as you may encounter a problem anytime since there's no downgrade migration.
Though everyone can decide by his own you should keep in mind you won't get any further security updates for Marshmallow from Samsung. In such case it may be better to go for a custom Marshmallow ROM which is still maintained (if available).
The battery management on Nougat is definitely better than on Marshmallow. You may search for the reasons of your problems...
It's not difficult to change the battery. There are some good step by step online manuals on youtube.