[karwos]

Originally Posted by tarpepan

First of all, is this model supported for flashing via USB?

[Nokia 301 USB Phonet]: Port opened OK!
MCU VersionV 02.33
MCU Date17-05-13
ProductRM-839 (Nokia RM-839)
Manufacturer(c) Nokia            
IMEI357276052219164
Mastercode316661327
IMEI Spare3A75720625121906
IMEI SV3375720625121906F6000000
PPMV 02.33, 17-05-13, RM-839, (c) Nokia            , E3
CNTContent: e3_059Q8Z0, V 02.33, 17-05-13, RM-839, (c) Nokia            
PSNB881F44BI
Product Code059Q8Z0
Module Code0205266
Basic Product Code059P5R3
PSD0000000000000000
LPSN0
Camera0C219803006007
RETUPMU_MAXIM8939B
AHNE13
HW2000
UEM3
UPPMFR:0xec,DEV:0x40,REV:0x231
RFIC152
LCDTPO
BT19e2-4702G12
ADSP SwPMU_MAXIM8939B
Asic11
HW Signature751E32C9EB384D75
Simlock ServerSIMLOCK SERVER
Simlock Key0010100000000000
Simlock Profile800000000004000B
Simlock Aux000B0000
Simlock IMEI00003572760522191600
Simlock Key Cnt0
Simlock FBUS Cnt0
Simlock [1,1]State: OPENEDType: MCC-MNCData: FFFFFF
Simlock [1,2]State: OPENEDType: GIDData: FFFF
Simlock [1,3]State: OPENEDType: GIDData: FFFF
Simlock [1,4]State: OPENEDType: IMSIData: FFFFFFFFFFFFFFFF
Simlock [1,5]State: OPENEDType: IMSIData: FFFFFFFFFFFFFFFF
Simlock [2,1]State: OPENEDType: MCC-MNCData: FFFFFF
Simlock [2,2]State: OPENEDType: GIDData: FFFF
Simlock [2,3]State: OPENEDType: GIDData: FFFF
Simlock [2,4]State: OPENEDType: IMSIData: FFFFFFFFFFFFFFFF
Simlock [2,5]State: OPENEDType: IMSIData: FFFFFFFFFFFFFFFF
Simlock [3,1]State: OPENEDType: MCC-MNCData: FFFFFF
Simlock [3,2]State: OPENEDType: GIDData: FFFF
Simlock [3,3]State: OPENEDType: GIDData: FFFF
Simlock [3,4]State: OPENEDType: IMSIData: FFFFFFFFFFFFFFFF
Simlock [3,5]State: OPENEDType: IMSIData: FFFFFFFFFFFFFFFF
Simlock [4,1]State: OPENEDType: MCC-MNCData: FFFFFF
Simlock [4,2]State: OPENEDType: GIDData: FFFF
Simlock [4,3]State: OPENEDType: GIDData: FFFF
Simlock [4,4]State: OPENEDType: IMSIData: FFFFFFFFFFFFFFFF
Simlock [4,5]State: OPENEDType: IMSIData: FFFFFFFFFFFFFFFF
Simlock [5,1]State: OPENEDType: MCC-MNCData: FFFFFF
Simlock [5,2]State: OPENEDType: GIDData: FFFF
Simlock [5,3]State: OPENEDType: GIDData: FFFF
Simlock [5,4]State: OPENEDType: IMSIData: FFFFFFFFFFFFFFFF
Simlock [5,5]State: OPENEDType: IMSIData: FFFFFFFFFFFFFFFF
Simlock [6,1]State: OPENEDType: MCC-MNCData: FFFFFF
Simlock [6,2]State: OPENEDType: GIDData: FFFF
Simlock [6,3]State: OPENEDType: GIDData: FFFF
Simlock [6,4]State: OPENEDType: IMSIData: FFFFFFFFFFFFFFFF
Simlock [6,5]State: OPENEDType: IMSIData: FFFFFFFFFFFFFFFF
Simlock [7,1]State: OPENEDType: MCC-MNCData: FFFFFF
Simlock [7,2]State: OPENEDType: GIDData: FFFF
Simlock [7,3]State: OPENEDType: GIDData: FFFF
Simlock [7,4]State: OPENEDType: IMSIData: FFFFFFFFFFFFFFFF
Simlock [7,5]State: OPENEDType: IMSIData: FFFFFFFFFFFFFFFF
Auto Selecting Flash Files on User Request...
[Nokia 301 USB Phonet]: Port opened OK!
Product Code: 059Q8Z0
This is Valid BB5 Product
No variant found with given Product Code, selecting first one
Processing pre flash tasks...
Backing up RPL...
RPL Creation started...
Processing CMT Part...
[Nokia 301 USB Phonet]: Port opened OK!
Storing Product Code...
Storing PSN...
Storing HWID...
Trying to store Simlock...
Reading Configuration Key...
Hashing...
Reading SHA1-RSA Signature...
Reading SHA1-HMAC Signature...
Storing Simlock...
Trying to store WMDRM RPL...
Reading Keys...
Failed to read WMDRM Key
Reading Security Block...
Security block OK and saved to "RM-839_357276052219164_7182013_21800 PM.SecurityBlock.PM"
WARNING: Failed to read RAP Public ID
Reading CYC file from phone...
Booting CMT...
[Nokia 301 USB Phonet]: Port opened OK!
Switching to RAW Mode...
[Nokia 301 USB Phonet]: Port opened OK!
Switching to RAW Mode...
[Nokia 301 USB Phonet]: Port opened OK!
Switching to RAW Mode...
[Nokia 301 USB Phonet]: Port opened OK!
Switching to RAW Mode...
BB5 USB Boot Rom not Detected -> Timeout, no any compatible USB device detected.
Failed to Boot CMT -> No compatible USB devices detected
Prepare phone failed with message -> Failed to Boot CMT
Failed to Create RPL from phone -> Failed to Boot / Prepare Phone

I assume that correct drivers aren't installed, but I installed latest official "Connectivity Cable Driver".

After "Switching to RAW Mode..." in device manager "NOKIA USB ROM" shows-up and disappear right after.

Any help would be appreciated. Thanks in advance

Do it like this:
Eject battery
Insert battery
Click check flashing bus
When progressbar will be decreasing
Insert usb cable and gentle press poweron button