Official download links for Android 7.1.2 (Nougat) vary depending on whether you are using a mobile device, a PC (x86), or a development board. Official Factory & OTA Images (Mobile Devices)
Once you have downloaded your android712.zip file, here is the standard procedure (assumes unlocked bootloader):
Warning: Downloading and installing Android 7.1.2 (or any other version) from unofficial sources can be risky and potentially harm your device. This review is for informational purposes only. android 712 download zip file link
Q: My phone is bricked. Will a ZIP file fix it? A: No. If you cannot access recovery, you need a Fastboot image (flashed via PC), not a simple ZIP.
Overview
Q: The article says "712" is a typo. Should I still search for it?
A: Most legitimate developers tag their files as 7.1.2. Searching for "712" will lead you to low-quality blogspam and malware. Always use the dot notation: 7.1.2.
The official Google Factory Image URL structure (requires a browser):
https://developers.google.com/android/images Official download links for Android 7
That being said, here's the download link for the Android 7.1.2 zip file: