To ensure the safety of your device, only download ROM zip files from reputable community platforms: LineageOS
"<device codename>" "android 7.0" custom rom zip download android 7.0 custom rom zip file download
Once you have the ROM zip file and the GApps zip file: To ensure the safety of your device, only
LineageOS 14.1 is the most popular Android 7.1.2 (similar to 7.0) custom ROM. Visit download.lineageos.org and search for your device codename. You will get a direct .zip download link signed by the LineageOS team. select the ROM ZIP
Go to Install , select the ROM ZIP, then "Add more ZIPs" and select GApps. Swipe to Flash: Once finished, tap Reboot System .
You should only download ROMs from reputable community sources to avoid bricking your device or security risks: Pixel Experience