[Android General] Julio2019:
I confirm that this process to unlock bootlader could be use without the need to upgrade to .117 st firmware. Unlock bootloader in my stock room zui 5.0.066 st. I'm going to proceed to install TWRP. Also no IMEI, nor Bluethooth or Modem issues here either. Also, KiiKeEp, sorry for bother you some minutes ago, my sn.img was an incorrect one, because i wrote the s/n that is in the box or in the about phone item menu. For readers, the correct s/n to use in zui.com to get the unlock image is the one that appears in diag mode menu (which you enter pressing the vol - key while powering the phone). Also to put the phone in download mode you only need to press the two volume keys at the same time without the need to power on the phone (remember to do this when you are connecting the phone to the PC for QFST work). Thanks kiikeEp

---------- Post added at 09:49 AM ---------- Previous post was at 09:43 AM ----------

I almost forgot, Remember pals that when you finish working with the phone (after installing TWRP, Root/Unrooting device) lock the bootloader again. In the same page and in the lenovo chinnese forums are the steps for doing so. That way, your phone doesn't get exposed to malware or to accidents when you are installing new ROMS. Do not worry, i promise to work with KiiKeEp and our friend who teached us how root the device in order to create a forum for this phone with detailed guides for these upgrades in the K5 pro phone, that in my opinion is a great phone.

---------- Post added at 10:03 AM ---------- Previous post was at 09:49 AM ----------

TWRP installation successfull, next i'm going to do Original global ROW stock ROM, in my case it would be ROW zui 5.0.066 st, and share it. Also i'm going to do my total efs backup. TWRP could be installed in the initial stock ROM (In my case zui 5.0.066 st)

---------- Post added at 10:09 AM ---------- Previous post was at 10:03 AM ----------

Full backup time 1 miunte 45 seconds. That was fast!

---------- Post added at 10:21 AM ---------- Previous post was at 10:09 AM ----------

Everything has been created.

---------- Post added at 10:23 AM ---------- Previous post was at 10:21 AM ----------

Proceding to upgrade the phone to the lastes CN ROM, zui 5.0.118 st, after that i'm going attempt to root the device.

---------- Post added at 10:37 AM ---------- Previous post was at 10:23 AM ----------

Passing my twrp backups folder to pc for backup. Done!

---------- Post added at 10:48 AM ---------- Previous post was at 10:37 AM ----------

Ok, i the stock rom zui 5.0.066, it wouldn't be an easy task, i need to learn to do that flash firmware but with compatible phones, so the users doesn't going to lose their imeis, modem, efs and bluetooth configuration.

---------- Post added at 10:48 AM ---------- Previous post was at 10:48 AM ----------

Anyway, i'm proceding to install Zui 5.0.188 st CN firmware.

---------- Post added at 11:10 AM ---------- Previous post was at 10:48 AM ----------

zui 5.0.118 installed successfully!, all process 8 minutes, very fast!

---------- Post added at 11:27 AM ---------- Previous post was at 11:10 AM ----------

this zui is fast! and has a little camera improvement

---------- Post added at 11:35 AM ---------- Previous post was at 11:27 AM ----------

everything is ok, but has some apps and menu items with Chinese characters, it's tolerable, if you value performance, (but its little), first thing first, root to uninstall CN bloatware and install playstore.