Download Android Jelly Bean 4.3 stock firmware for OnePlus One from here or from here. Download Android 4.4 Kitkat stock firmware for OnePlus One from here.
Archives: OnePlus 4.3 fw
Archives size: 527 MB
Image file name: signed_2833_OnePlus_xxos.zip
Platform: Qualcomm Snapdragon 801
Build number: msm8974-user 4.3 JLS36C eng.root.20140822.004710 release-keys
Archives: OnePlus 4.3 fw
Archives size: 527 MB
Image file name: signed_2833_OnePlus_xxos.zip
Platform: Qualcomm Snapdragon 801
Build number: msm8974-user 4.3 JLS36C eng.root.20140822.004710 release-keys
Caution
Please do not update firmware unless you know what you are doing, you really want it or it is absolutely necessary. Firmware updates may occasionally have bad results, like bricking your device, temporarily or permanently. The firmware update process is done entirely at your own risk. Before attempting to update the firmware, back up your data.
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