Download Android 4.4 Kitkat stock firmware for OnePlus One from here, here or from here. File name: aosp-One-ota-20140719.zip (231 MB)
Instructions
1. Place the downloaded .zip somewhere easily accessible on your phone 2. Unlock bootloader and acquire custom recovery from here. 3. Reboot to recovery (power off, then power + volume down until it vibrates)4. Wipe your device (incl. cache & dalvik) 5. Flash the .zip. Flash Gapps - gapps-kk-20140606-signed.zip6. Reboot
General
- Warranty info: Doing this does not void your warranty. If you brick your phone, however, you're on your own. We will repair it, but that's not covered by warranty.
- Please don't use toolkits. Learning how this works is good for you.
Known issues
- Gyroscope may not work for all devices
- Encryption features and VPN do not work
There may be more - with the help of you, our bleeding-edge users, we’ll be able to improve this product until it’s 100% stable and beyond.
via forums.oneplus.net
ADS HERE !!!