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[Official] LG G4 US991 US Cellular Stock Rom



You can use these official firmware to :

  • Unbrick LG G4 US991 (US Cellular)
  • Updates LG G4 US991 (US Cellular) to Android 6.0 Marshmallow
  • Downgrade/Rollback LG G4 US991 (US Cellular) USA Sprint to Android 5.1.1 Lollipop
  • Flashing LG G4 US991 (US Cellular)
  • Hared Reset / Restore LG G4 US991 (US Cellular) to 100 % stock factory
  • Unroot LG G4 US991 (US Cellular)
  • Repair solutions for LG G4 US991 (US Cellular) if boot loop, Hardbrick, Lost recovery, or stuck on logo and we know that this is not a problem with the machine or Hardware, but only software. Usually occurs because installing false ROM/firmware, conflict in system/data, overclocking CPU or infected Virus.

Notes :

  • How to install LG G4 US991 (US Cellular) Firmware → Read Here
  • Download LG G4 Firmware based Versions : H815 (EMEA), H815AR, H815TR (Turkey), H815L (Israel), , H815P (LATAM, South Africa), H815T (Australia, Hong Kong), H812 (Canada), H810 (US AT&T), H815K (Australia, Israel), H811 (USA T-Mobile), LS991 (USA Sprint), US991 (US Cellular), VS986 (US Verizon).
  • All LG Mobile Phone Firmware / Stock Rom → Download here
  • How to root LG G4  USA → Read Here
  • LG G4 US991 (US Cellular) Full phone specifications –> Read Here


 LG G4 Firmware (Stock Rom)
Device Model : US991
Device Android OS
Firmware Version Release date
Link Changelog
LG G4 US991 (US Cellular) 6.0 Marshmallow  US99120a August, 2016 Download General maintenance
 LG G4 US991 (US Cellular)  6.0 Marshmallow US99120c  February, 2016 Download Android 6.0 Marshmallow Software Update “only if not already updated”. General maintenance
 LG G4 US991 (US Cellular)  6.0 Marshmallow US99120b January, 2016 Download Updates to Android 6.0 Marshmallow
 LG G4 US991 (US Cellular)  5.1.1 Lollipop  US99110d September, 2015 Download Security updates “including Stagefright”, General maintenance
 LG G4 US991 (US Cellular)  5.1.1 Lollipop  US99110c  June,2015 Download General maintenance

Please leave comment if you have question or found broken link.

Say thanks to develover :

(Paypal donate) @autoprime “92% of testing for about all our alternative goodies get tested by autoprime, he is awe-inspiring, he even wrote up the directions for this root”.

(Paypal donate) @IllegalArgument “as was common, Illegal Argument could be a genius. He conjointly may well be a mad person, it will not surprise Pine Tree State once he achieves nuclear fusion somehow”.
(Paypal donate) @thecubed “What he wants to do, he would do even if it is dangerous for her, all for us all”.
(Paypal donate) @jcase  “Gotta add jcase here, he is a wealth of knowledge and a damn good gallant all around”.



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  1. Pingback: Official – LG G4 US991 US Cellular Stock Rom – ForDroid - December 26, 2016

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