Send the following on WhatsApp
Continue to ChatHow to Downgrade OnePlus 3/3T from Android Oreo to Nougat https://www.stechguide.com/downgrade-oneplus-3-3t-from-android-oreo-to-nougat/
How to Downgrade OnePlus 3/3T from Android Oreo to Nougat https://www.stechguide.com/downgrade-oneplus-3-3t-from-android-oreo-to-nougat/