Huawei Y210d Firmware Flashing Failed
Following the instructions, flash each UPDATE.APP in order:


Transfer > put the UPDATE.APP file in a new folder sdcard\dload and run forced upgrade (vol up + down)
dload (main) > overwrite UPDATE.APP in sdcard\dload, run forced upgrade again
vendor > overwrite UPDATE.APP in sdcard\dload and run forced upgrade for the last time


Note:


the UPDATE.APP needs to be copied from each folder to sdcard\dload\
phone should reboot after each forced upgrade