Need help to better understand update policy and situation

[BlackAlez]

Hi all,
I'm Italian, and I've just buyed this amazing phone on Amaz0n from a Chinese Shop. In build number I have:
- ZTE B2017G V1.0.0B05
Can I update to some updated version? Where can I download it?
Also, I've tried an update from some guide on the web, but from the recovery it gives me always an error
-- Install /sdcard/update.zip
Finding update package
Opening update package
Verifying update package
E: footer is wrong
E: signature verification failed
E: open file /cache/fota/error_code error errno = 2
Installation aborted.

I understand that every country has it's own policy but now I would like to know if:
1) I've to forgot about have android 7.1.1 anytime
2) There is a possibility to have better information about some manual update

Thank you for the attention. Hope I haven't broke any forum rules (this is my first post...after some answer in "markw" terminal forum).

Have a great day
Alex

 

[saymonek]

ZTE Support is really BAD - they do not response to my questions, or redirecting to different country support. I own Axon 7 mini from UK and nobody (!!) know anything about update to android 7.
Try to visit http://www.ztedevice.com/support/ and find your device's country, and then download proper firmware - I'm afraid you are trying to update wrong firmware so signature is different, and update won't apply. Good luck!

 

[BlackAlez]

Thank you for the answer, but in the last day I've understood the situation for the most part, their lack of support it's like any other "samsung-like" manufacturer. Maybe later today I will post what I've found. There isn't also a good community in Italy.