New RS988 Software Update - 21c

djskribbles

Senior Member
Feb 25, 2011
255
109
63
Thanks for the heads up.

Just installed it on my device and it's the July security patch.

Really wish there was an option to wipe the system cache on this device. I usually do this on my devices after a software update and was surprised there was no option in the recovery.
 

ctrclckws

Senior Member
Feb 26, 2011
82
16
0
I hope it helps with my two biggest issues for nougat on this phone.
Battery life went to 4 hours or less.
And in the New York area, on AT&T it starts with a 4Glte connection, but then drops down to slower speeds and never recovers.
 

acefsw

Senior Member
Oct 24, 2012
192
51
0
Coatesville
Yeah, I have the same AT&T Lte problem. Just installed the update and hope it fixes it. Hard to test right now. At the airport and lte tends to not drop me here. The problem is generally reaquiring Lte after it drops to HSPA.
 

-lukin-

Senior Member
Jan 4, 2012
300
34
48
I see the update but can't get it to install. My RS988 is unlocked with TWRP and Magisk. Phone reboots to install update and goes to TWRP. Hit system reboot and back in OS without update installed
 

tryfe

Member
Nov 11, 2013
18
12
33
Well my reception is still crud on T-Mobile. I have to resort to using their Digits app to get all my messages and calls at home.
 

Dildacorn

Member
Jun 3, 2017
9
0
0
RS98821c Noticeable Improvements

My carrier is Verizon. I know hate me if you want.

Anyway the things I noticed so far almost instantly after installing this update is that my fingerprint sensor is faster. The phone is slightly more responsive, and that my battery life has improved a little bit. Awesome update for the LG G5!
 

wolfu11

Senior Member
Jan 26, 2013
621
409
93
Minneapolis
My carrier is Verizon. I know hate me if you want.

Anyway the things I noticed so far almost instantly after installing this update is that my fingerprint sensor is faster. The phone is slightly more responsive, and that my battery life has improved a little bit. Awesome update for the LG G5!
Does anyone know if the anti rollback number changed?
 

acefsw

Senior Member
Oct 24, 2012
192
51
0
Coatesville
I guess this version will fix the AT&T LTE issue.
So far, it seems to have fixed the AT&T connectivity issue. I used Open Signal prior to this upgrade to analyze my connectivity. I was not locking on to/switching to the closest tower and always got stuck with HSPA even if there was a closer lte connection. It just would not hand off once dropped off lte. Now, it seems to work as it should. I am now always on the closest connection.
 
  • Like
Reactions: damiloveu

DeathCom

New member
Sep 2, 2017
2
1
0
My carrier is Verizon. I know hate me if you want.

Anyway the things I noticed so far almost instantly after installing this update is that my fingerprint sensor is faster. The phone is slightly more responsive, and that my battery life has improved a little bit. Awesome update for the LG G5!
I also have this on verizon, as always, just want to be sure tether options are still unlocked with this update. Can you confirm?
 

Dildacorn

Member
Jun 3, 2017
9
0
0
I also have this on verizon, as always, just want to be sure tether options are still unlocked with this update. Can you confirm?
What do you mean tether options? You mean USB debugging for ADB and so on? They have been working for me just fine. USB 3.1 to HDMI works, and so does tethering for internet to a PC. Not sure what you mean by tethering options other than that sorry.

---------- Post added at 10:50 PM ---------- Previous post was at 10:46 PM ----------

Latest update seems pretty solid. I think battery life may have improved slightly. No problems charging, however I did factory reset.

Sent from my RS988 using XDA-Developers Legacy app
Agreed battery life did improve a little bit. I am still going to try rooting eventually and getting LSpeed in the process. Should fix a lot of the issues I have had with this phone!

---------- Post added at 10:58 PM ---------- Previous post was at 10:50 PM ----------

I read on an older post that enabling "Force GPU rendering" in the developer options made the LG G5 faster. I don't know if that only applies to the older Marshmellow version or if it also applies in the current android nougat update. I'm testing it now!

Also to add to this post. If I leave my phone in my pocket when it is asleep it gets super hot! I'm not sure why, and I am guessing doing a factory reset will solve the issue. Although if I do reset the device, I'm definitely going to root it in the process. LG should release an update where we can clear system cache to solve issues...This has been in every phone leading up and has been known to solve issues with OS update... I shouldn't have to factory reset my device to fix stupid problems like these.
 

Dildacorn

Member
Jun 3, 2017
9
0
0
Ok, so enabling "Force GPU rendering" does make the phone more responsive. The battery seems about the same if not better than before when the option is enabled in Developer Options. Try it out! Hope it helps! :)
 

DeathCom

New member
Sep 2, 2017
2
1
0
What do you mean tether options? You mean USB debugging for ADB and so on? They have been working for me just fine. USB 3.1 to HDMI works, and so does tethering for internet to a PC. Not sure what you mean by tethering options other than that sorry.
Oh I was just worried about mobile hotspot and usb tether. Verizon users with classic unlimited plans are technically not allowed to tether. Anyway I am happy to report that 21c does not hinder any of those features either.
 
  • Like
Reactions: Dildacorn

Unscedeo

Senior Member
Sep 11, 2016
70
54
18
Installing 21c with TWRP

Hello G5 owners,

I have an LG G5 with an unlocked bootloader and TWRP installed. I am also currently running on stock version 21a. Excuse me of I'm being a noob, but how do I install updates? I have the update downloaded, but when i try to install it, it brings me to TWRP. Do I have to obtain the ZIP file from someone else?
 

kattolo

Member
Dec 13, 2010
23
7
0
Chicago
Hello G5 owners,

I have an LG G5 with an unlocked bootloader and TWRP installed. I am also currently running on stock version 21a. Excuse me of I'm being a noob, but how do I install updates? I have the update downloaded, but when i try to install it, it brings me to TWRP. Do I have to obtain the ZIP file from someone else?
In order to be able to perform the OTA upgrade at the very least your recovery (and possibly boot partition as well) needs to be the stock one, if you have TWRP and rooted the upgrade will fail.
I believe that the proper recovery for the 21a should be available in CODEFIRE's downloads

First of all I'd suggest you to take a full backup of apps and data (I personally use titanium backup) and save it on your PC

Go to the All in One thread from Autoprime (https://forum.xda-developers.com/lg-g5/how-to/info-autos-g5-thread-t3350648) and look for "Download LG G5 Files From Codefire Here"
in the RS988 folder for the 21a I saw a recovery.img that likely is the stock one. If that is indeed the stock recovery, you can flash it in fastboot (you might need to flash the boot too if the update fails with the correct recovery) , run the update and then reflash TWRP and suspersu (in case you lose SU)

I would suggest you to confirm with the codefire team if that is the correct file (it is in the correct folder but the name is quite generic), worst case scenario, in case it is not and you have already flashed it, you might need to reflash back twrp and wait for the correct one to be made public before being able to run the update with minimal hassle.
If the boot partition was patched too upon rooting, some checksum might cause the update to fail as well

Alternatively you could take a full app/data backup, reflash 21a stock, run the updates, reflash twrp and then root again and restore the original app/data backup (as mentioned in https://forum.xda-developers.com/showpost.php?p=72649831&postcount=8)


I now have a question still related to this upgrade; is there any way to pull a backup of the 21c (including boot and recovery)?
No recent kdz appears to be available, hopefully we will get another patch sometime soon that could address the blueborne vulnerability, and I wanted to have a way to restore boot and recovery to stock so to run the future OTAs.

would I need to unlock, boot in twrp (fastboot boot twrp-3.0.2-1-rs988.img) and run a dd dump of sde1 and sde2 from there?
 
Last edited: