[Samsung Galaxy Note 8 Guides, News, & Discussion] AdyGreg:
Having Issue with Battery, Performance, Camera, Sound, or Signals/Network after installing Custom Rom, then this threat is perfect for you.

Your Phone must be ROOTED !!!!

Disclaimer - I am not responsible if anything wrong happens, you are doing it on your own Risk.

Battery -

Download the two Given Apps

L Speed - https://apkpure.com/l-speed-gaming-battery-saver-performance-root/com.paget96.lspeed/download

Easy DPI Changer - https://play.google.com/store/apps/details?id=com.chornerman.easydpichanger&hl=en_IN

Set L Speed Profiles to Balance Mode and

Set Resolution to 1080x2220 (FHD) or 1480x720(HD)

Performance -

If you want to increase +10-15 fps while playing games then follow the instructions.

1st -

Flash Custom Kernel

By flashing custom kernel, there is high chances to increase performance of your device.

These are my recommendation,

For Lineage OS/AOSP based ROM use RZ Kernel.

For oneUI (9 above) based ROM use Phantom Kernel.

For samsung experience (7.1.1-8.1) based ROM use Zceed Kernel.

RZ Kernel - https://xdaforums.com/galaxy-note-8/development/kernel-rz-kernel-samsung-galaxy-note-8-t3916568

Phantom Kernel - https://xdaforums.com/galaxy-note-8/development/kernel-phantom-kernel-n950-f-fd-n-t3825268

Xceed Kernel - https://xdaforums.com/galaxy-note-8/development/kernel-xceed-t3728594

2nd -

Tweaking Kernel

Download this app

Mtweak - https://androidfilehost.com/?fid=4349826312261770830

This app enable us to control over the kernel which we flashed on our device.

If you don't care about battery life then follow this steps.

1) Must Flash BusyBox and Root Manager.

2) Give Root Access to Mtweaks

3) go to CPU option

4) set CPU Governor to Performance and enable Apply to Boot

5) go to GPU option

6) set GPU Governor to Booster and enable Apply to Boot

Camera -

GCAM for NOTE 8 - https://xdaforums.com/galaxy-note-8/themes/google-camera-hdr-portrait-t3730325

Flash Camera2API using any Custom Recovery [Not Compulsory]

Camera2API - https://www.cyanogenmods.org/downloads/camera2-api-enabler-zip-file-download/

Sound -

The port which I am going to give will improve your device Sound Quality Dramatically.

Choose any one Part. (Both Part works absolutely fine)

Part I

Dolby for Q - https://drive.google.com/file/d/1-4fI3JSIdFoHJQ2PUHFxQiHumOGYszCs/view (All Four)

OR

Part II

ACDB-0.47 - https://drive.google.com/file/d/1SGO_y4kpeO7wGFMkvJgVUWHP9iTw95Bc/view

Dolby-Atmos-RC4-ACDB - https://drive.google.com/file/d/1Z5G6KJpP-93dI2MlgebSSVvpU4LbxtUB/view

Flash these Modules using Magisk Manager.

You can feather improve using ViPER4Android FX

https://magiskroot.net/viper4android-fx/

If you want Dual Speaker functionality.

XDA Forum - https://xdaforums.com/galaxy-note-8/themes/dual-speakers-samsung-galaxy-note-8-t4110799

Follow the instructions and you're good to go.

If still unable to follow, here is the Link for

YouTube video - https://youtu.be/k0eLNnazoGo

Signal/Network -

Go to Access Point Names(APN), Create a New APN and Fill the give Information

Name - AnyName

APN - portalnmms

APN type - **LEAVE IT BLANK**

APN protocol - IPv4/IPv6

APN roaming protocol - IPv4/IPv6

Bearer - Uncheck Unspecified and Check LTE to GPRS

Save the API, wait for 5 min and you might see some Improvement.

Fast Charging -

Force Fast Charge - https://xdaforums.com/redmi-note-4/themes/magisk-force-fast-charge-emperoreye1993-t3804901

Flash it using Magisk.

Can’t say it has a full fix but bring bit improvements to it.

Test on Lineage OS 16, Lineage OS17.1, Pixel Experience Plus, Evolution X 2.4, Evolution X 4.3, crDroid, HavocOS 2.x, and some AOSP based ROMs.

You can also use these Tweaks on any ONE UI Rom like Hades Rom.

Follow the Steps

Systematically

.

And If any Query You can Reply or DM me on Instagram - adygreg

Youtube Channel - https://www.youtube.com/channel/UCfgOffADDHCh7dOxUeB4NRQ