Help Downgrading my S7

[Siberio08]

Aight, so a couple of weeks ago I decided to finally accept the update that I always skipped, that pesky Android OREO (8.0) update was always harassing my notification panel and I finally decided to accept it and just update. What could go wrong?
After I updated, and saw that a few features were cool, I noticed something...
My phone was not charging even though it was connected to the charger. I tried airplane mode, I tried maximum power saving mode, I tried safe mode, I turned it off and nothing happened. It just didn't want to charge; some might say that it's just a battery issue, but I'm pretty sure that's not the case.
This happened right after I updated my lovely Nougat to Oreo.

So now I need help.
Here are my phone's specs:
*Build Number: R16NW.G930PVPU6CRE7
*SE for Android status: SEPF_SM-G930P_8.0.0_0008
*Fri May 25 20:35:22 2018
*Knox version: Knox 3.1, Knox API level 25, TIMA 3.3.0
*Security Software version: MDF v3.1 Release 2, WLAN v1.0 Release 1, VPN PP-MOD v2.1 Release 1.0, ASKS v1.4 Release 180123, FIPS BoringSSL v1.2, FIPS SKC v1.7, FIPS SCrypto v1.0, SMR Apr-2018 Release 1
*Android security patch level: April 1, 2018
*Model Number: SM-G930P
*IMEI: 353562085155911
*Software version: G930PVPU6CRE7
*Hardware version: REV0.6
*Android Version: 8.0.0 Oreo (I want 7, Nougat)
*Samsung Experience version: 9.0
*Baseband version: G930PVPU6CRE7
*Kernel version: 3.18.71-13585094, [email protected] #1

My phone is a SPRINT unlocked version, 32 gb. You can check out those specs; probably understand them a lot better than I do.
The thing is, I know that I'm going to have to root it in order to install a previous Android version (downgrade). I just don't want to take any risks with flashing the wrong firmware for my specific phone; I don't want to brick it.

So, can y'all please help me with choosing the right -my phone specific- firmware and stuff?
Giving me a step-by-step on how to successfully downgrade back to my 7.0 nougat would be a blessing too.

Thank You!

 

[yves31]

Aight, so a couple of weeks ago I decided to finally accept the update that I always skipped, that pesky Android OREO (8.0) update was always harassing my notification panel and I finally decided to accept it and just update. What could go wrong?
After I updated, and saw that a few features were cool, I noticed something...
My phone was not charging even though it was connected to the charger. I tried airplane mode, I tried maximum power saving mode, I tried safe mode, I turned it off and nothing happened. It just didn't want to charge; some might say that it's just a battery issue, but I'm pretty sure that's not the case.
This happened right after I updated my lovely Nougat to Oreo.

So now I need help.
Here are my phone's specs:
*Build Number: R16NW.G930PVPU6CRE7
*SE for Android status: SEPF_SM-G930P_8.0.0_0008
*Fri May 25 20:35:22 2018
*Knox version: Knox 3.1, Knox API level 25, TIMA 3.3.0
*Security Software version: MDF v3.1 Release 2, WLAN v1.0 Release 1, VPN PP-MOD v2.1 Release 1.0, ASKS v1.4 Release 180123, FIPS BoringSSL v1.2, FIPS SKC v1.7, FIPS SCrypto v1.0, SMR Apr-2018 Release 1
*Android security patch level: April 1, 2018
*Model Number: SM-G930P
*IMEI: 353562085155911
*Software version: G930PVPU6CRE7
*Hardware version: REV0.6
*Android Version: 8.0.0 Oreo (I want 7, Nougat)
*Samsung Experience version: 9.0
*Baseband version: G930PVPU6CRE7
*Kernel version: 3.18.71-13585094, [email protected] #1

My phone is a SPRINT unlocked version, 32 gb. You can check out those specs; probably understand them a lot better than I do.
The thing is, I know that I'm going to have to root it in order to install a previous Android version (downgrade). I just don't want to take any risks with flashing the wrong firmware for my specific phone; I don't want to brick it.

So, can y'all please help me with choosing the right -my phone specific- firmware and stuff?
Giving me a step-by-step on how to successfully downgrade back to my 7.0 nougat would be a blessing too.

Thank You!

I cannot believe the charging problem is caused by Oreo. Try different chargers, and new USB cables. Google the issue to see if it's related to Oreo. If you are absolutely sure this is due to Oreo, then you may change it and root is not required.

Since the phone is still on bootloader 6, you may be able to downgrade to Nougat with the same version of bootloader. Flashing firmware is a complex process and phone may be easily bricked if anything goes wrong, so you need to understand what you are doing exactly. I would suggest to read thoroughly information related to Samsung Galaxy firmware update using Odin software. I usually get s7 firmware from two sites:
https://updato.com/
https://www.sammobile.com/firmwares/galaxy-s7/

 

[tahasmarty]

Switch off your phone then try charging?

 

[Siberio08]

I cannot believe the charging problem is caused by Oreo. Try different chargers, and new USB cables. Google the issue to see if it's related to Oreo. If you are absolutely sure this is due to Oreo, then you may change it and root is not required.

Since the phone is still on bootloader 6, you may be able to downgrade to Nougat with the same version of bootloader. Flashing firmware is a complex process and phone may be easily bricked if anything goes wrong, so you need to understand what you are doing exactly. I would suggest to read thoroughly information related to Samsung Galaxy firmware update using Odin software. I usually get s7 firmware from two sites:
https://updato.com/
https://www.sammobile.com/firmwares/galaxy-s7/

Well, ironically, my mother got a new -android- phone a couple of days ago and my phone charges pretty fine with her charger. I guess it WAS a charger problem, but my charger works perfectly fine on my father's phone and not on mine; strange.

The thing is, although it can now charge, the super battery drainage is still there, and yes, I'm convinced the quick battery drainage problem came along with the Oreo update. It lasted hours and hours on Nougat, but now on Oreo it barely gets to 3 hours and 30 minutes.