The Ultimate Guide to ZTE Terminal Software Update Framework
: RSA-2048 with SHA-256 digest, ZTE-specific OTA keys. Zte Terminal Software Update Framework Download
The is a proprietary OTA system. You cannot download the framework separately – it's pre-installed on devices. What you can download are firmware update packages from ZTE's official support portal. For deep technical analysis, refer to publicly available Android AOSP update mechanisms (on which ZTE's system is based) or decompile the FotaProvider.apk and ZteUpdateEngine from a ZTE device's /system/app partition. The Ultimate Guide to ZTE Terminal Software Update