Important to note:
This tutorial is supported only with the Oppo Find 7s devices, codenamed with find7s. Dont use this rom to another Oppo devices, commonly, You will mistaken with Oppo Find 7a, it have differrent Lineage OS ROM.
Make sure your Oppo Find 7s bootloader unlocked and have a TWRP Recovery installed. Read this guide to install twrp recovery.
In order to install correctly this Nougat ROM you will need to wipe the data and/or factory reset your Xiaomi Mi5. This step is included in the tutorial and it means that You will have to backup all your files using cloud storage services, a external SD Card or PC. Using Titanium Backup is not recomended.
Creating a nandroid back-up is also needed to anticipate if something bad happened during intstalation or after instalation. You can restore to the earlier rom you've been used before with a nandroid backup you'll created.
Make sure that your smartphone s battery charge level is over 30%, at least 60% is good enough. This will prevent it from powering down while you're updating your Find7s (find7s) to Nougat 7.1.1 using Lineage OS ROM
If you done with all prequisites mentioned above, you can now forward to these steps by step guide.
1. Download ROM LineageOS 14.1 Oppo Find 7s
This release version availabe in nightly build. The Official LOS 14.1 is on development stage, it will (probably) have some issues after you install this build. Surely, you can leave this page if you don't interested. If you insist after knowing this, download LOS 14.1 below, and don't blame us if something bad happened. We've told You.
Source: Lineage Official, link
2. Download Nougat Lineage OS GappsLineage OS 14.1 ROM is commonly based on Android 7.1.1 with 64 bit architecture, you can download these smallest compatibel GApps package with arm64 and sdk 7.1, provided by opengapps.org
Those zip above is the smallest package. If want more option go ahead to choose suitable nougat gapps package according your data plan. Aroma variant is the largest package with instalation wizard powered with Aroma Installer.
3. Installing Nougat 7.1.1 Lineage OS on Oppo Find 7s
How to Install Nougat 7.1.1 Lineage OS on Oppo Find 7s (find7s) and adding GApps into Lineage OS:
Transfer both the Custom ROM and Nougat Lineage OS Gapps packages to the internal storage of your device.
Power off your device and boot into TWRP Recovery mode.
Once, you are into TWRP Recovery main menu, you need to make a hard reset.
From the TWRP main menu tap on the wipe button and select Advanced Wipe. Then select all: Dalvik/art cache, System, Data and Cache options.
Flash the custom ROM now. Choose the Install option from the recovery menu and choose the ROM zip from the file manager.
Reboot into recovery after completed, don't reboot into system yet.
Now, flash the Nougat Lineage OS Gapps package that you've downloaded before in the same way as you did with the custom ROM
Reboot the device into system and complete the initial setup.
Enjoy Android Nougat 7.1 with Lineage 14.1 for Oppo Find 7s
Now you know where you can download Nougat 7.1.1 Lineage OS Official ROM for Find 7a (find7) and how to install it on your smartphone.
You can also read how to enable native root access in Lineage OS. In those guide also explain to you how to replace native root with SuperSU without flashing zip.
Please leave your review in the comment section. Or if you have diffucuties in LineageOS 14.1 for Oppo Find 7s Android Nougat 7.1.1 topic, don't hesitate to write a question in the comment section .