Download Android Jelly Bean 4.2.1 stock firmware for THL W8 smartphone from here or here. Download another THL firmware from here.
Archive: ThL_W8.JB2.HD.EN.COM.8P32_MT6589V1.0.6_20130807
Firmware: Android Jelly Bean 4.2.1 stock
Build number: ThL-user 4.2.1 JOP40D eng.builder.1375865716 test-keys
Archive: ThL_W8.JB2.HD.EN.COM.8P32_MT6589V1.0.6_20130807
Firmware: Android Jelly Bean 4.2.1 stock
Model: THL W8 smartphone
Image file size: 575 MB
Platform: Mediatek MT6589Image file size: 575 MB
Build number: ThL-user 4.2.1 JOP40D eng.builder.1375865716 test-keys