Oppo Find 7a is a robust phone with high specs. It comes equipped with its operating system based on android. The OnePlus One has a connection with Oppo as the OnePlus One smartphones are manufactured in the same facilities as the Oppo smartphones. The internal hardware is same so does the firmware found on both the phones. They are so similar, as through a little bit of tweaking you can install CyanogenMod OS on Opppo Find 7a. CyanogenMod is OS that runs on OnePlus One. Let’s have a look that how to install CyanogenMod ROM on Oppo Find 7a.
First thing you need to do is to flash the ROM. To do this you need to install a custom recovery such as TWRP or ClockworkMod. Install the ROM at the source link you found through recovery. These source links are also available at android forums and sites. Search by installing CyanogenMod ROM on Find 7a and you would find two source links that you have to insert. Then install the OTA found at the second source for fixing sound problems.
Through this you can enjoy the benefits of CyanogenMod on Oppo Find 7a. Although there are some problems that needs to be fixed by the android community. The first issue is that the photos taken from back camera will appear upside down. Voice wake is also not available, similarly NFC would not work. The software shows that only 3GB of storage space is available. These are few issues, if you can put up with these issues than go ahead and install CyanogenMod on Oppo. [source]