Failed To Upgrade To V8.2 From V8.1

[eddycy]

i try to install xiaomi.eu_ulti_MI4s_v8.2.1.0.LAJCNDL_v8.5.1.zip in TWRP
but I was getting error show as below:

Install Zip
Failed

-----------------------------------------------------------------
Update partition details...
...donw
Full SELinux support is present
MTP Enabled
Installing zip file '/sdcard/xiaomi.eu_ulti_MI4s_v8.2.1.0.LAJCNDL_v8.5.1.zip'
Checking for MD5 file...
Skipping MD5 check: no MD5 file found
Verifying zip signature...
Zip signature verification failed!
Error installing zip file '/sdcard/xiaomi.eu_ulti_MI4s_v8.2.1.0.LAJCNDL_v8.5.1.zip'
Updating partition details...
...done
-----------------------------------------------------------------

 

[Santigt]

Update fisrt twrp to greatlson versión. Reboot on twrp, not a sistem reboot, and before try again

Enviado desde mi MI 4S mediante Tapatalk

 

[Santigt]

http://en.miui.com/thread-522096-1-1.html
Twrp

Enviado desde mi MI 4S mediante Tapatalk

 

[dump9x]

try uncheck verification