If an update is available, tap Download (wait for completion over Wi-Fi).
Click Start or Upgrade . Do not disconnect the USB cable until completion. How to Update Software on ZTE Blade A35 Core
The tool will detect your device. Load the official firmware file ( .pac or .mbn format) if required. If an update is available, tap Download (wait
Tap Check for Updates . The device will contact ZTE’s servers. The tool will detect your device
A: Generally no. Android blocks rollbacks to prevent security vulnerabilities. The only way is via custom recovery (not recommended for average users). By following this guide, you can safely keep your ZTE Blade A35 Core running smoothly and securely. When in doubt, always prefer the OTA update method – it’s designed to be foolproof. For further help, visit the official ZTE community forums or your local service center.
Scroll down and tap System (or About Phone on some UI versions).