If a downloaded theme reverts to the default system appearance after a few minutes, you are likely using a trial version of a premium theme.
Design and visual coherence
While APK archive sites like APKMirror and APKPure maintain older versions of Vivo Themes, a significant word of caution is necessary. The current version 17.6.5.0 has a different signature and system requirement set compared to 7.4.4.0. Downgrading can potentially cause conflicts with newer system services. Moreover, Vivo officially only supports themes downloaded through iTheme, and third-party theme files are not supported. If you do choose to sideload, ensure you download only from reputable sources and always scan files for malware. vivo themes 7.4.4.0
: This version offers a larger repository of high-definition wallpapers and diverse icon styles compared to older builds. If a downloaded theme reverts to the default