To Chinese users:
I've provided these update packages on Baidu Netdisk, you can download them from here.
https://pan.baidu.com/s/1LgCntbY-6JRznCw0ONQybA Password: b76d
Confirm your current version by dialing *#*#227#*#* before update.
Then download the package and rename to the specific filename I gave, place it to root directory of internal storage and dial *#*#874#*#* to update.
After the update procedure completed, update package will be deleted from your phone automatically.
September 2017 to November 2017 (E1M-055B-0-00WW-B01-037C-0-00WW-B03-update.zip)
November 2017 to January 2018 (E1M-064A-0-00WW-B04-055B-0-00WW-B01-update.zip)
Jaunary 2018 to February 2018 (E1M-064B-0-00WW-B01-064A-0-00WW-B04-update.zip)
February 2018 to March 2018 (E1M-064C-0-00WW-B01-064B-0-00WW-B01-update.zip)
March 2018 to April 2018 (E1M-064E-0-00WW-B01-064C-0-00WW-B01-update.zip)
April 2018 to May 2018 (E1M-064G-0-00WW-B01-064E-0-00WW-B01-update.zip)
May 2018 to June 2018 (E1M-064J-0-00WW-B01-064G-0-00WW-B01-update.zip)
June 2018 to July 2018 (E1M-064Q-0-00WW-B01-064J-0-00WW-B01-update.zip)
July 2018 to August 2018 (E1M-0650-0-00WW-B01-064Q-0-00WW-B01-update.zip)
WARNING: After August 2018 Update, bootloader unlock key won't be accepted!
You'll need old OTA packages to revert booloader back before unlocking.
Android 8.1 September Beta (E1M-115P-0-00WW-B01-update.zip)
More to be added.