Send the following on WhatsApp
Continue to ChatDownload and Install Android 8.0 Oreo on HTC U11 (TW 2.31.709.1) https://www.stechguide.com/install-android-8-0-oreo-on-htc-u11/
Download and Install Android 8.0 Oreo on HTC U11 (TW 2.31.709.1) https://www.stechguide.com/install-android-8-0-oreo-on-htc-u11/