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tecno cf8 error during flashing

tecno cf8 error during flashing

mykeljosh34
mykeljosh34
mykeljosh34
Techie Member
41
26-06-2020, 12:43 AM
#1



Hello team, i received a tecno cf8 that was stuck on logo for flashing but, i checked the build number from the recovery mode but didnt find exact build, downloaded same variant and same sub ordinate but different date, and flash with transsion software download with FIRMWARE UPGRADE option selected,  the flashing didnt push through completely but stuck after formatting the bootloader and shows error checksum,  tried 2-3rd time no way, same checksum error and device refused to power on, so i decided to flash with CM2 with da file, the flash push tru and completed but still the phone didnt power on.
checked some software download error online and edicted the checksum figure to 0 on the firmware forlder and tools but still same checksum error,   also deleted the checksum file and try creating and generation another one but checks cant generate due to same multiple files in the firmware,  i also downloaded another paid firmware but still same checksum error when flashing.. 
flashed with 2 software download version v4.18***  and v4.19*** but same checksum error.
sp flashtools is asking for auth file when try to use..  thats all i have tried so far...
thanks for your advice.
X3non
X3non
X3non
Recognized Contributor
22,062
26-06-2020, 11:00 AM
#2
(26-06-2020, 12:43 AM)mykeljosh34 Hello team, i received a tecno cf8 that was stuck on logo for flashing but, i checked the build number from the recovery mode but didnt find exact build, downloaded same variant and same sub ordinate but different date, and flash with transsion software download with FIRMWARE UPGRADE option selected,  the flashing didnt push through completely but stuck after formatting the bootloader and shows error checksum,  tried 2-3rd time no way, same checksum error and device refused to power on, so i decided to flash with CM2 with da file, the flash push tru and completed but still the phone didnt power on.
checked some software download error online and edicted the checksum figure to 0 on the firmware forlder and tools but still same checksum error,   also deleted the checksum file and try creating and generation another one but checks cant generate due to same multiple files in the firmware,  i also downloaded another paid firmware but still same checksum error when flashing.. 
flashed with 2 software download version v4.18***  and v4.19*** but same checksum error.
sp flashtools is asking for auth file when try to use..  thats all i have tried so far...
thanks for your advice.

what was the original build number of the device? and the build number of the firmwares you flashed?
did you try disconnecting / reconnecting the battery of the device after successfully flashing?
mykeljosh34
mykeljosh34
mykeljosh34
Techie Member
41
26-06-2020, 03:43 PM
#3
Orig build: Cf8-h622ab-190122v198, Oh my God, I just figured out the error, the build I flash was Cf8-h622AB-O the difference is the sub variant letter ’O’. How come I didn’t see the difference before flashing full firmware, so close... and I couldn’t find the orig build online with the ’ O’ build..
X3non
X3non
X3non
Recognized Contributor
22,062
27-06-2020, 09:35 AM
#4
(26-06-2020, 03:43 PM)mykeljosh34 Orig build: Cf8-h622ab-190122v198,  Oh my God, I just figured out the error, the build I flash was Cf8-h622AB-O      the difference is the sub variant letter ’O’. How come I didn’t see the difference before flashing full firmware, so close...    and I couldn’t find the  orig build online with the ’ O’ build..

the O indicates the android version oreo, your orig build number should have it as well (unless you forgot)
...and the build number of the firmwares you attempted to flash?
did you try disconnecting / reconnecting the battery of the device after successfully flashing?

if you can find a build number higher than the original build, you could try that as well e.g CF8-H622AB-O-190614V231 @ https://drive.google.com/uc?id=1i3v7whLr...t=download
This post was last modified: 27-06-2020, 09:38 AM by X3non.
mykeljosh34
mykeljosh34
mykeljosh34
Techie Member
41
27-06-2020, 02:20 PM
#5



after successful flashing with CM2 ,I didn't disconnect the battery, just did hold the power button and it didn't on, as for other inbuit mtk phones I have been working on, I don't use to disconnect the battery, just hold power and it will on, first build i flashed with software downloads
Cf8-h622ab-o-181114v150 shows checksum error and flash completed with cm2 but didn't turn on, later downloaded this firmware from easy-firmware Cf8-h622ab-o-190614v231 but still show checksum error with software download
X3non
X3non
X3non
Recognized Contributor
22,062
29-06-2020, 10:02 AM
#6
(27-06-2020, 02:20 PM)mykeljosh34 after successful flashing with CM2 ,I didn't disconnect the battery, just did hold the power button and it didn't on, as for other inbuit mtk phones I have been working on, I don't use to disconnect the battery, just hold power and it will on, first build i flashed with software downloads
Cf8-h622ab-o-181114v150 shows checksum error and flash completed with cm2 but didn't turn on, later downloaded this firmware from easy-firmware Cf8-h622ab-o-190614v231 but still show checksum error with software download

disconnect / reconnect the battery to be sure the device isn't stuck in flash mode
have you tried flashing the Cf8-h622ab-o-190614v231 build using cm2?
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