[G4 Q&A, Help & Troubleshooting] tian6869:
Help, (LG G4) LGUP said Unknown Model

Hi, I accidentally formatted the phone, now need to downgrade to LL from MM VS9862BA, so I can root the phone and recover all the photos of my son.

I am following every steps.

However, after

1. install LG driver (LG_VZW_United_WHQL_v2.22.0) -> LGUP DLL (LGUP_8994_DLL_Ver_0_0_3_23) -> LGUP (LGUP_Store_Frame_Ver_1_14_3_3)

2. change the port to 41

3. run as Admin

4. Check debugger mode

5. Change USB option to file transfer

LGUP says unknown model.

Any one know how to fix this?

after reading all the posts, it seems no one has this problem.

Every one seems following the instruction without problem identify the phone.

LOG from LGUP

[ 1:22:35] Start Find Available USB Port

[ 1:22:35] Find 0 Communications Port (COM1)

[ 1:23:52] Start Find Available USB Port

[ 1:23:52] Find 0 LGE Mobile for VZW USB Serial Port (COM41)

[ 1:23:52] Find 1 Communications Port (COM1)

[ 1:23:52] CBasicComControl:pen, the port(COM 41) is constructed successfully => HANDLE : 0x4d0

[ 1:23:52] CPort:penPort() Success. Port number is 41

[ 1:23:52] [T000003] 41 54 0D AT.

[ 1:23:54] CBasicCom::SendRecvPacket, PACKET_ERROR code = 1460 Msg => This operation returned because the timeout period expired.

[ 1:23:54] [T000005] EF 00 16 65 7E ...e.

[ 1:23:56] Response packet time out 2000 milisec

[ 1:23:56] CBasicCom::SendRecvPacket, PACKET_ERROR code = 1460 Msg => This operation returned because the timeout period expired.

[ 1:23:56] ---------------------------------------------------------------------------------

[ 1:23:56] SubProcess Name : NoOperationCmd

[ 1:23:56] [T000004] 06 4E 95 7E .N..

[ 1:23:59] Response packet time out 3000 milisec

[ 1:23:59] CBasicCom::SendRecvPacket, PACKET_ERROR code = 1460 Msg => This operation returned because the timeout period expired.

[ 1:23:59] Error! CCmdProcess::ExecuteCommand() ℃ SendRecvPacket()

[ 1:23:59] ---------------------------------------------------------------------------------

[ 1:23:59] SubProcess Name : DiagVerNO

[ 1:23:59] [T000004] 00 78 F0 7E .x..

[ 1:24: 4] Response packet time out 5000 milisec

[ 1:24: 4] CBasicCom::SendRecvPacket, PACKET_ERROR code = 1460 Msg => This operation returned because the timeout period expired.

[ 1:24: 4] Error! CCmdProcess::ExecuteCommand() ℃ SendRecvPacket()

[ 1:24: 4] ---------------------------------------------------------------------------------

[ 1:24: 4] SubProcess Name : DloadVerNO

[ 1:24: 4] [T000003] 00 00 7E ...

[ 1:24: 4] [T000004] 0C 14 3A 7E ..:.

[ 1:24: 9] Response packet time out 5000 milisec

[ 1:24: 9] CBasicCom::SendRecvPacket, PACKET_ERROR code = 1460 Msg => This operation returned because the timeout period expired.

[ 1:24: 9] Error! CCmdProcess::ExecuteCommand() ℃ SendRecvPacket()

[ 1:24: 9] Intel_ModelName is not define! CCmdProcess::GetCommandDataByName

[ 1:24: 9] ---------------------------------------------------------------------------------

[ 1:24: 9] SubProcess Name : GetBinVersionD

[ 1:24: 9] [T000003] 00 00 7E ...

[ 1:24: 9] [T000007] FA 47 00 00 28 DD 7E .G..(..

[ 1:24:24] Response packet time out 15000 milisec

[ 1:24:24] CBasicCom::SendRecvPacket, PACKET_ERROR code = 1460 Msg => This operation returned because the timeout period expired.

[ 1:24:24] Error! CCmdProcess::ExecuteCommand() ℃ SendRecvPacket()

[ 1:24:24] ---------------------------------------------------------------------------------

[ 1:24:24] SubProcess Name : DiagTestModeVersion

[ 1:24:24] [T000003] 00 00 7E ...

[ 1:24:24] [T000007] FA 00 00 00 5B 57 7E ....[W.

[ 1:24:27] Response packet time out 3000 milisec

[ 1:24:27] CBasicCom::SendRecvPacket, PACKET_ERROR code = 1460 Msg => This operation returned because the timeout period expired.

[ 1:24:27] Error! CCmdProcess::ExecuteCommand() ℃ SendRecvPacket()

[ 1:24:27] ---------------------------------------------------------------------------------

[ 1:24:27] SubProcess Name : DloadVerNO

[ 1:24:27] [T000003] 00 00 7E ...

[ 1:24:27] [T000004] 0C 14 3A 7E ..:.

[ 1:24:32] Response packet time out 5000 milisec

[ 1:24:32] CBasicCom::SendRecvPacket, PACKET_ERROR code = 1460 Msg => This operation returned because the timeout period expired.

[ 1:24:32] Error! CCmdProcess::ExecuteCommand() ℃ SendRecvPacket()

[ 1:24:32] CComPort::ClosePort, Closed Port Successfully for COM 41

[ 1:24:32] CBasicComControl::Close, the port(COM41) is closed successfully

[ 1:24:32] Update Fail. 'Unknown' model is detected.[ 1:24:47] CBasicComControl::IsConnected, the port(COM41) connection is not detected

Please help, Thanks