Information about LG US991 aka LG G4

LG US991 Phone Specification

Model and Features
Model LG US991
Series LG G4 LTE-A (LG P1)
Release Date June, 2015
Depth 9.8 mm (0.39 in)
Size (width x height) 148.9 x 76.1 mm (5.86 x 3.00 in)
Weight 155 g (5.47 oz)
Operating System Android 5.1 (Lollipop)
Hardware
CPU 2 x 1.8 GHz + 4 x 1.44 GHz Qualcomm Snapdragon 808 MSM8992
CPU Cores Hexa-core
RAM Memory 3 GB
Internal Storage 32 GB
External Storage MicroSD, Up to 2 TB
Network and Data
Sim count 1 Micro-SIM
2G network GSM 850/900/1800/1900 MHz
3G network HSDPA 850/900/1900/2100 MHz
4G network LTE1900 (B2), LTE1700/2100 (B4), LTE850 (B5), LTE700 (B12), LTE700 (B13), LTE700 (B17), LTE1900 (B25)
Data GPRS/EDGE
Display
Screen size 5.5 inches
Display Type Color IPS TFT LCD
Display Resolution 1440 x 2560 pixels (538 ppi)
Display Colors 16M colors
Battery and Keyboard
Battery Capacity Removable Li-Ion 3000 mAh
Physical keyboard No
Interfaces
Audio output 3.5 mm jack
Bluetooth v. 4.0, A2DP, BLE, apt-X
DLNA Yes
GPS Yes, with A-GPS, GLONASS
Infrared port Yes
NFC Yes
USB Micro-USB 2.0
WiFi WI-FI 802.11 a/b/g/n/ac

LG US991 Firmware List

Region File name OS File size Date Downloads
UCK
North America
US/United States
US99124a_00_0119.kdzFile exist in our server Unknown 1.42 G 2017-03-30 288 time(s)
UCK
North America
US/United States
US99125a_00_0317.kdzFile exist in our server Android 6.0.x Marshmallow 1.42 G 2017-04-13 309 time(s)
UCL
North America
US/United States
US99120c_03_0129.kdzFile exist in our server Unknown 1.42 G 2016-07-03 83 time(s)
UCL
North America
US/United States
US99121a_02_0620.kdzFile exist in our server Unknown 1.42 G 2016-07-20 90 time(s)
UCL
North America
US/United States
US99122a_00_0714.kdzFile exist in our server Unknown 1.42 G 2016-08-10 42 time(s)
UCL
North America
US/United States
US99123a_00_1118.kdzFile exist in our server Unknown 1.42 G 2016-12-12 127 time(s)
UCL
North America
US/United States
US99124a_00_0119.kdzFile exist in our server Unknown 1.42 G 2017-02-07 92 time(s)
UCL
North America
US/United States
US99125a_00_0317.kdzFile exist in our server Android 6.0.x Marshmallow 1.42 G 2017-04-10 140 time(s)

Here you can see region description table
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  • Subash

    Thank you lg-firmwares for providing kdz file.

  • AAnarchYY

    What is the number Following the Firmware? Is that the rollback version?
    IE: US99121a_02_0620.kdz (which is the one i have) would be Model US991 version 21a anti-rollback v2?
    If so, does that mean i would not be able to flash US99122a_00_0714.kdz even though it is newer, but has a lower anti-rollback?

    • We not recommend downgrade LG phone in new versions, only up version.
      If you downgrade you make this on own risk.

      • AAnarchYY

        22a would be an upgrade from the 21a i have right now though, wouldn’t it be?

        • Yes you can update 21a to 22a or 25a.

          • AAnarchYY

            Thank you, but you still haven’t answered my original question, about the file naming, is that number the anti-rollback or something else? and if it is, will that 22a with the 00 reset my anti-rollback or something?

          • This something else.