The stock ROMs shared here are meant specifically for ZTE U819 smartphone. Download any of the three (3) firmware packages here and follow flashing instructions at the end of post.
All three firmware packages work just fine, so you are free to make your choice.
- ZTE U819 (Android 4.2.2, Vibe UI) – Download
- ZTE U819 (4.2) – Download
- ZTE U819 (4.2) – OS2.7 – Download
NOTE: The only relevant difference (besides Android version) between these firmware files is the UI.
How to flash
Follow the flashing instructions here https://www.leakite.com/2016/09/how-to-flash-zte-stock-rom-firmware-via.html