1.You need to install OnePlus 2 drivers on your computer.
3.Download official TWRP recovery 126.96.36.199.img
4.Enable USB Debugging and OEM unlock option: To do so, go to Settings
-> About Phone -> tap Build Number 7 times to enable Developer
options. From Developer options, enable USB Debugging and OEM unlock.
5.Unlock Bootloader of Oneplus two.
Warning: The author is not responsible, if you damage or brick your device. Do it at your own risk and follow the instructions properly.
#How to Install Custom recovery in OnePlus Two
1.Download TWRP recovery for Oneplus 2 from here.
2.Copy the recovery file in your fastboot folder.
3.Now Put the phone in fastboot mode and connect it to your PC via usb cable.
►How to boot Oneplus Two in Fastboot mode?
Turn off your device.Then Press (Power button +Volume Up ) button simultaneously.Done!
4.Open a command prompt from within your fastboot folder (shift + right
click, select open command prompt here)
fastboot flash recovery <filename>.img
(Replace <filename> with the actual filename of the
recovery, the recovery filename in the command will change depending on
which recovery you’re flashing)
#Then enter the Following command
5.Let the device reboot, it’s now safe to disconnect your usb cable.
6.Now you can reboot in to recovery mode in OnePlus Two by pressing ( the power + volume down button ).
After flashing Custom Recovery follow this guide on
1.How to root Oneplus 2 easily