[Galaxy Note 3 General] TecM:
In this super long shlong guide, I will show you how to lower / manage the temp on 4 types of devices with 2 guides each:

Phone with removable back cover & root (tested on Note 3 by me)

Phone with removable back cover & no root (not confirmed working but should work)

Phone without removable back cover, root & case (not confirmed working but should work)

Phone without removable back cover, no root & case (tested on Huawei Y6 2019)

(If you have one of the devices listed above then this has a higher chance of doing more than if it's another device with the description listed above)

(Also,I'm not responsible for any damages on the root section (bricked phones, wars because you got hacked and your Nan thought Donald Trump was about to take your country ect, do the root ones at your own risk, and also I'm not responsible for any physical damage made and the white house exploding)

So now that you know what could happen, let's get to it!

TYPE 1: Phone with removable back cover WITHOUT root:

Software:

You will want to go to settings

Enable dev options by going to phone info and clicking build until it either says dev options enabled or confirm via pattern & then after you did your password, it says dev options enabled

Then you'll wanna go to the dev options & then set the background limit to 1 or none

& also if you want to, enable do not keep activities (programs may reset every time you leave the app and come back)

Also, if you have more settings like battery and startup or other power saving stuff then go for it!

Hardware:

Take off the removable back case

Then find a material or what I chose, a balloon and cut a square and fold it but not too many times that it kills your removable case

Then fold it and make sure it sticks together and put it on top of the camera where the only hole on the back case is, recommended at the top

Then put the removable back case on with the 2 clips at the top not connected

Benefits: Lower temp

Disadvantages: Lower performance, apps can restart on accidental leaving / uploading files from phone

TYPE 2: Phone with removable back cover WITH root:

Software:

First, youll want to make sure you have the best ROM suited for you

& youll also want to make sure to back the best kernel for your needs (if sometimes, you really care about performance)

You will want to go to settings

Enable dev options by going to phone info and clicking build until it either says dev options enabled or confirm via pattern & then after you did your password, it says dev options enabled

Then you'll wanna go to the dev options & then set the background limit to 1 or none

& also if you want to, enable do not keep activities (programs may reset every time you leave the app and come back)

Also, if you have more settings like battery and startup or other power saving stuff then go for it!

Get a kernel manager (recomended: smartpack from github)

its recommended to make power saving profiles aswell as performance

If you have the ondemand govenor, you can edit it to be more power efficent & so the cpu almost hardly goes up unlike other govenors

(also check other govenors if they powersave more than ondemand or if you dont have it)

Then if your kernel supports it (like LolZ), tinker with the lowest volts your phone can sustain, i have a post for the ones for the Note 3.

Hardware:

Take off the removable back case

Then find a material or what I chose, a balloon and cut a square and fold it but not too many times that it kills your removable case

Then fold it and make sure it sticks together and put it on top of the camera where the only hole on the back case is, recommended at the top

Then put the removable back case on with the 2 clips at the top not connected

Benefits: Lower temp, custom settings & dosent take a lot to change most of it

Disadvantages: Can bootloop or destroy device, disadvantages of TYPE 1

Type 3: Phones without removable back case WITHOUT root with case:

Software:

You will want to go to settings

Enable dev options by going to phone info and clicking build until it either says dev options enabled or confirm via pattern & then after you did your password, it says dev options enabled

Then you'll wanna go to the dev options & then set the background limit to 1 or none

& also if you want to, enable do not keep activities (programs may reset every time you leave the app and come back)

Also, if you have more settings like battery and startup or other power saving stuff then go for it!

Hardware:

First, take off the case

Get 2 pieces of toilet tissue

Fold them both & place them in a way where the camera ring part has a space between it

Advantages: Better lower temp than TYPE 1

Disadvantages: Disadvantages of TYPE 1

Type 4: Phones without removable back case WITH root with case:

Software:

First, youll want to make sure you have the best ROM suited for you

& youll also want to make sure to back the best kernel for your needs (if sometimes, you really care about performance)

You will want to go to settings

Enable dev options by going to phone info and clicking build until it either says dev options enabled or confirm via pattern & then after you did your password, it says dev options enabled

Then you'll wanna go to the dev options & then set the background limit to 1 or none

& also if you want to, enable do not keep activities (programs may reset every time you leave the app and come back)

Also, if you have more settings like battery and startup or other power saving stuff then go for it!

You will want to go to settings

Enable dev options by going to phone info and clicking build until it either says dev options enabled or confirm via pattern & then after you did your password, it says dev options enabled

Then you'll wanna go to the dev options & then set the background limit to 1 or none

& also if you want to, enable do not keep activities (programs may reset every time you leave the app and come back)

Also, if you have more settings like battery and startup or other power saving stuff then go for it!

Get a kernel manager (recomended: smartpack from github)

its recommended to make power saving profiles aswell as performance

If you have the ondemand govenor, you can edit it to be more power efficent & so the cpu almost hardly goes up unlike other govenors

(also check other govenors if they powersave more than ondemand or if you dont have it)

Then if your kernel supports it (like LolZ), tinker with the lowest volts your phone can sustain, i have a post for the ones for the Note 3.

Hardware:

First, take off the case

Get 2 pieces of toilet tissue

Fold them both & place them in a way where the camera ring part has a space between it

Advantages: Prob the best one out of the others on this guide

Disadvantages: Performance ofc & Disadvantages of TYPE 1

(If theres anything missing from this guide / smt incorrect PLEASE let me know)