Don't know if my phones bootloader is locked, but I bought it direct from T-Mobile US. Instructions for sideloading using ADB are on the top of the download page. It didn't wipe my phone and it's quicker than an OTA install. https://developers.google.com/android/ota#oriole
When you say "using the latest version of adb", are you referring to the latest version of Platform Tools? Are your drivers up-to-date? Try using different cables and/or ports?Trying to sideload the OTA image file downloaded from Google, using latest version of adb, seems to getting stuck at "serving: 'oriole-ota-tp1a.220624.021-a13fd9d0.zip' (~3%)" - phone displaying "Verifying update package..."
I've sideloaded OTA images in the past without any issues, anybody have a suggestion?
Did you confirm you got a clean download by running a SHA-256 checksum? Just a stab in the dark