Overview LG X420HM(LMX420HM) aka LG K40

Specification LG X420HM(LMX420HM) aka LG K40

Model and Features
Model LG X420HM
Series LG K40
Release Date April, 2019
Depth 8.3 mm (0.33 in)
Size (width x height) 153.2 x 71.9 mm (6.03 x 2.83 in)
Weight 144 g (5.08 oz)
Operating System Android 8.x Oreo Mirror Release 1
Hardware
CPU 2.0GHz MediaTek MT6762
CPU Cores Octa-core
RAM Memory 2GB
Internal Storage 32GB
External Storage microSD, up to 1 TB
Network and Data
Number of sim slots 1 Nano-Sim
2G network GSM 850/900/1800/1900 MHz
3G network HSDPA 850/900/1900/2100 MHz
4G network LTE band 1(2100), 2(1900), 3(1800), 4(1700/2100), 5(850), 7(2600), 8(900), 12(700), 13(700), 17(700), 20(800), 25(1900), 26(850), 28(700), 40(2300), 41(2500), 46, 48, 66(1700/2100)
5G network
Data GPRS/EDGE
Display
Screen size 5.7 inches (~75.4% screen-to-body ratio)
Display Type IPS LCD capacitive touchscreen
Display Resolution 720 x 1440 pixels (~284 ppi density)
Display Colors 16M colors
Battery and Keyboard
Battery Capacity Non-removable Li-Ion 3000 mAh
Physical keyboard
Interfaces
Audio output 3.5mm jack
Bluetooth version 5.0, A2DP, LE, aptX HD
DLNA Yes
GPS Yes, with A-GPS, GLONASS
Infrared port No
NFC No
USB microUSB 2.0
WiFi Wi-Fi 802.11 b/g/n, Wi-Fi Direct, hotspot

Firmwares LG X420HM(LMX420HM) aka LG K40

LG Phone firmwares regions descriptions
Region File name OS Size Date Downloads
ARG
  • Argentina
X420HM10f_00_OPEN_SCA_OP_0806.kdz Android 8.x Oreo Mirror Release 1 2.08 GiB 2019-09-12 25 time(s)
CAD
  • Dominica
X420HM10b_00_CLR_COM_OP_0508.kdz Android 8.x Oreo Mirror Release 1 2.35 GiB 2019-07-25 11 time(s)
CAD
  • Dominica
X420HM10e_00_CLR_COM_OP_0806.kdz Android 8.x Oreo Mirror Release 1 2.41 GiB 2019-09-26 4 time(s)
CAD
  • Dominica
X420HM10f_00_CLR_COM_OP_1023.kdz Android 8.x Oreo Mirror Release 1 2.42 GiB 2019-12-05 0 time(s)
CAO
  • Unknown
X420HM10b_00_CLR_COM_OP_0508.kdz Android 8.x Oreo Mirror Release 1 2.35 GiB 2019-07-25 3 time(s)
CAO
  • Unknown
X420HM10e_00_CLR_COM_OP_0806.kdz Android 8.x Oreo Mirror Release 1 2.41 GiB 2019-10-10 1 time(s)
CHL
  • Chile
X420HM10c_00_OPEN_SCA_OP_0425.kdz Android 8.x Oreo Mirror Release 1 2.04 GiB 2019-07-25 16 time(s)
CHL
  • Chile
X420HM10d_00_OPEN_SCA_OP_0617.kdz Android 8.x Oreo Mirror Release 1 2.05 GiB 2019-08-29 6 time(s)
CHL
  • Chile
X420HM10f_00_OPEN_SCA_OP_0806.kdz Android 8.x Oreo Mirror Release 1 2.08 GiB 2019-10-17 5 time(s)
CLA
  • Chile
X420HM10c_00_CLR_COM_OP_0604.kdz Android 8.x Oreo Mirror Release 1 2.36 GiB 2019-08-08 3 time(s)
CLA
  • Chile
X420HM10e_00_CLR_COM_OP_0806.kdz Android 8.x Oreo Mirror Release 1 2.41 GiB 2019-09-19 2 time(s)
CLP
  • Peru
X420HM10b_00_CLR_COM_OP_0508.kdz Android 8.x Oreo Mirror Release 1 2.35 GiB 2019-07-25 8 time(s)
CLP
  • Peru
X420HM10c_00_0711.kdz Android 8.x Oreo Mirror Release 1 2.35 GiB 2019-08-22 2 time(s)
CLP
  • Peru
X420HM10e_00_CLR_COM_OP_0806.kdz Android 8.x Oreo Mirror Release 1 2.41 GiB 2019-09-19 0 time(s)
CLP
  • Peru
X420HM10f_00_CLR_COM_OP_0906.kdz Android 8.x Oreo Mirror Release 1 2.41 GiB 2019-10-24 2 time(s)
CLP
  • Peru
X420HM10g_00_CLR_COM_OP_1105.kdz Android 8.x Oreo Mirror Release 1 2.41 GiB 2019-12-12 0 time(s)
CMC
  • Colombia
X420HM10b_00_CLR_COM_OP_0508.kdz Android 8.x Oreo Mirror Release 1 2.35 GiB 2019-07-25 1 time(s)
CMC
  • Colombia
X420HM10c_00_0711.kdz Android 8.x Oreo Mirror Release 1 2.35 GiB 2019-08-15 2 time(s)
CMC
  • Colombia
X420HM10e_01_CLR_COM_OP_0903.kdz Android 8.x Oreo Mirror Release 1 2.41 GiB 2019-10-10 4 time(s)
CMC
  • Colombia
X420HM10f_00_CLR_COM_OP_1107.kdz Android 8.x Oreo Mirror Release 1 2.41 GiB 2019-11-28 1 time(s)
COL
  • Colombia
X420HM10e_00_OPEN_SCA_OP_0702.kdz Android 8.x Oreo Mirror Release 1 2.05 GiB 2019-07-25 22 time(s)
COL
  • Colombia
X420HM10f_00_OPEN_SCA_OP_0806.kdz Android 8.x Oreo Mirror Release 1 2.08 GiB 2019-10-10 8 time(s)
CRI
  • Costa Rica
X420HM10a_02_ICE_CR_OP_0508.kdz Android 8.x Oreo Mirror Release 1 2.11 GiB 2019-07-25 4 time(s)
CRI
  • Costa Rica
X420HM10a_03_ICE_CR_OP_0806.kdz Android 8.x Oreo Mirror Release 1 2.15 GiB 2019-10-03 1 time(s)
CTI
  • Argentina
X420HM10d_00_0725.kdz Android 8.x Oreo Mirror Release 1 2.34 GiB 2019-08-22 1 time(s)
CTI
  • Argentina
X420HM10e_00_CLR_COM_OP_0806.kdz Android 8.x Oreo Mirror Release 1 2.41 GiB 2019-09-05 2 time(s)
EPT
  • Ecuador
X420HM10b_00_CLR_COM_OP_0508.kdz Android 8.x Oreo Mirror Release 1 2.35 GiB 2019-07-25 1 time(s)
EPT
  • Ecuador
X420HM10e_00_CLR_COM_OP_0806.kdz Android 8.x Oreo Mirror Release 1 2.41 GiB 2019-09-12 1 time(s)
PRN
  • Argentina
X420HM10d_00_OPEN_SCA_OP_0604.kdz Android 8.x Oreo Mirror Release 1 2.05 GiB 2019-09-12 2 time(s)
PRN
  • Argentina
X420HM10f_00_OPEN_SCA_OP_0806.kdz Android 8.x Oreo Mirror Release 1 2.08 GiB 2019-10-31 1 time(s)
TCL
  • Mexico
X420HM10a_02_0507.kdz Android 8.x Oreo Mirror Release 1 2.26 GiB 2019-07-25 20 time(s)
TCL
  • Mexico
X420HM10a_03_0705.kdz Android 8.x Oreo Mirror Release 1 2.28 GiB 2019-08-01 3 time(s)
TCL
  • Mexico
X420HM10a_04_0827.kdz Android 8.x Oreo Mirror Release 1 2.28 GiB 2019-09-12 4 time(s)
TCL
  • Mexico
X420HM20a_00_1010.kdz Android 9 Pie 2.66 GiB 2019-11-14 5 time(s)
TCL
  • Mexico
X420HM20a_01_1111.kdz Android 9 Pie 2.66 GiB 2019-12-05 1 time(s)
TFH
  • Chile
X420HM10d_00_OPEN_SCA_OP_0604.kdz Android 8.x Oreo Mirror Release 1 2.05 GiB 2019-08-15 1 time(s)
TFH
  • Chile
X420HM10f_00_OPEN_SCA_OP_0806.kdz Android 8.x Oreo Mirror Release 1 2.08 GiB 2019-10-24 0 time(s)
TFR
  • Ecuador
X420HM10e_00_OPEN_SCA_OP_0702.kdz Android 8.x Oreo Mirror Release 1 2.05 GiB 2019-08-01 4 time(s)
TFR
  • Ecuador
X420HM10f_00_OPEN_SCA_OP_0806.kdz Android 8.x Oreo Mirror Release 1 2.08 GiB 2019-09-26 1 time(s)
TFS
  • Argentina
X420HM10e_00_OPEN_SCA_OP_0702.kdz Android 8.x Oreo Mirror Release 1 2.05 GiB 2019-08-22 3 time(s)
TGO
  • Unknown
X420HM10b_00_TGO_COM_OP_0508.kdz Android 8.x Oreo Mirror Release 1 2.04 GiB 2019-07-25 3 time(s)
TGO
  • Unknown
X420HM10c_00_TGO_COM_OP_0806.kdz Android 8.x Oreo Mirror Release 1 2.08 GiB 2019-08-29 3 time(s)
TPO
  • Mexico
X420HM10a_02_0507.kdz Android 8.x Oreo Mirror Release 1 2.26 GiB 2019-07-25 2 time(s)
TPO
  • Mexico
X420HM10a_03_0705.kdz Android 8.x Oreo Mirror Release 1 2.28 GiB 2019-08-01 0 time(s)
TPO
  • Mexico
X420HM10a_04_0827.kdz Android 8.x Oreo Mirror Release 1 2.28 GiB 2019-09-12 1 time(s)
TPO
  • Mexico
X420HM20a_00_1010.kdz Android 9 Pie 2.66 GiB 2019-11-14 5 time(s)
TPO
  • Mexico
X420HM20a_01_1111.kdz Android 9 Pie 2.66 GiB 2019-12-05 1 time(s)
URY
  • Uruguay
X420HM10f_00_OPEN_SCA_OP_0806.kdz Android 8.x Oreo Mirror Release 1 2.08 GiB 2019-09-12 3 time(s)

Manual LG X420HM(LMX420HM) aka LG K40

How to Hard Reset on LG X420HM(LMX420HM) aka LG K40 ?


Type 1:

 

Type 2:

 

Type 3:

 

  1. Turn off the phone.
  2. Next press and hold the Power key and Volume down key for ten seconds.
  3. Release the power key while holding down the volume key.
  4. Next press the power button again.
  5. After these actions, the Factory Reset menu will appear on the screen.

    Type 1:

    Type 2:

  6. Use the Power key and Volume key to confirm the process.
  7. The hard reset is completed now.
  8. As a result of these actions, the memory of your phone cannot be restored.

How to Factory Reset through menu on LG X420HM(LMX420HM) aka LG K40 ?

  1. Open the Main Menu.
  2. Go to "Settings".
  3. In Settings choose "General".

  4. In General select "Backup & Reset".

  5. Next, clik on "Reset Phone".

  6. Confirm by clicking  "Erase Everything".

  7. Finally, press "OK".

  8. The hard reset is completed now. 
  9. As a result of these actions, the memory of your phone can not be restored.

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