Standard FOTA updates typically include critical security patches to protect the connected car system from remote vulnerabilities. Installation and Safety Precautions
For manual installation, files in .img format must be flashed using specialized tools like PhoenixSuit . fota v8.1.1 %21NEW%21
While official changelogs for these specific Chinese-market head units can be difficult to find, community discussions on platforms like the 4PDA forums suggest the following improvements in the v8.1.1 series: fota v8.1.1 %21NEW%21
(often rooted for customization) V8.1.1_20220104.150944_THEME1 V8.1.1_20210604.170040_TW2-X fota v8.1.1 %21NEW%21