Tested to flash my phone to 20171227 version. (20171227_s21v57c2k_jk_tee) Everything according to "flashing-8000pro_v3.pdf" OK except actual flashing step 8. After pressing "START ALL" and connecting phone to Cable again while pressing vol up button. Nothing happens... No sound ...

Again, this CAN'T be done because PC does not recognize connected phone! Even with correct drivers which (before this OTA update) were working and firmware flashing was working smoothly The problem here seems not if it's easy or not to flash the rom, the problem is that the mobile seems to not be d...

How do I have to update the device to firmware 20171227 ?. Is this done by local update? I'm a bit scared, because when I previously updated to 20171227 the device was more than 2 hours updated. Has anyone tried it, does it work? You'll have to FLASH it. Download the rom file from here: http://bbs....

People please stop saying that maybe we all have dirty sockets or bad cables or chargers and PCs without drivers! My phone was fully working and I am always using original adapter and cable. Also I was succesfully flashing firmware via PC so all my drivers are OK. Right after the update, phone is NO...

Problem is that you CAN'T flash any other rom since USB is not working anymore. So PC won't recognize this phone.

I have exactly the same problem! So my phone is now unusable, thanks!
PLEASE FIX ASAP!!!!!!!!!!!