Return to 100% Stock

Dowload the latest fastboot image

https://cyngn.com/support (i.e cm-13.1.2-ZNH2KAS3P0-bacon-signed-fastboot-76d803f730.zip)

Unlock your phone

• Unplug your phone from your PC
• Power off your phone then boot into fastboot mode (volume up + power).
• Connect your phone to your PC via usb cable.
• Unlock you rphone

$ {
fastboot oem unlock
fastboot reboot-bootloader
}

Flash the fastboot image

$ {
fastboot flash modem NON-HLOS.bin
fastboot flash sbl1 sbl1.mbn
fastboot flash dbi sdi.mbn
fastboot flash aboot emmc_appsboot.mbn
fastboot flash rpm rpm.mbn
fastboot flash tz tz.mbn
fastboot flash LOGO logo.bin
fastboot flash oppostanvbk static_nvbk.bin
fastboot flash recovery recovery.img
fastboot flash system system.img
fastboot flash boot boot.img
fastboot flash cache cache.img
fastboot flash userdata userdata_64G.img
fastboot reboot-bootloader
}

Change ROM for your OPO

Install a custom Recovery

• Download latest Unofficial TWRP 3.0.3-5 by TugaPower - https://forum.xda-developers.com/oneplus-one/development/unofficial-twrp-3-0-x-tugapower-t3398366
• Unplug your phone from your PC
• Power off your phone then boot into fastboot mode (volume up + power).
• Connect your phone to your PC via usb cable.

$ mv TWRP_*-TugaPower.img recovery.img
$ {
fastboot oem unlock
fastboot flash recovery recovery.img
fastboot format cache
fastboot reboot-bootloader
}

Download the files

• Download a ROM
• Android 7.1.1 - https://forum.xda-developers.com/oneplus-one/orig-development/rom-android-source-project-nde63p-t3490172/page51
• Android 6.0.1 - https://forum.xda-developers.com/oneplus-one/orig-development/rom-kernel-unofficial-cyanogenmod-13-0-t3242700
• Download Gapps for ARM
• Pick the GApps AROMA package, or less than stock because /system is < 1500GiB
• http://opengapps.org/
• Dowload SuperSU (for root)
• https://forum.xda-developers.com/apps/supersu/

Install a ROM with the Recovery

• Unplug your phone from your PC
• Power off your phone then boot into Recovery mode (volume down + power).
• Wipe system, cache, dalvik and data.
• Reboot to Recovery
• For system, cache and data, choose one by one Repair or Change File System, Change File System and pick F2FS.
• Reboot to Recovery
• Copy to the Internal Storage the ROM and the Gapps packags.
• Install ROM
• Reboot to recovery
• Flash Gapps
• Reboot to recovery
• Flash SuperSU if needed
• Reboot - 1st boot takes around 5 minutes.