Vestel exists as a brand in the device detector. However, for some user agents, this information can not be parsed well.

Examples:
Opera/9.80 (Linux mips; U; ; en) Presto/2.10.287 Version/12.00 UID(00:09:DF:3D:64:E3/MB91/VESTEL/3.2.9.r)+CE-HTML;MEM:HIGH

Opera/9.80 (Linux mips; ) Presto/2.12.407 Version/12.51 MB98/0.45.14.5 (VESTEL, Mxl66155_V, wireless) VSTVB_MB97 UID(00:09:DF:D7:F2:BB/MB98/VESTEL/0.45.14.5)+CE-HTML;MEM:HIGH SmartTvA/3.0.0