Download Android KitKat 4.4.4 stock Firmware for THL 2015 smartphone from here or from here. Download another THL firmware from here.
Archive: ThL.2015
Archive file size: 647 MB
Platform: MT6572
Project: bird6752_lwt_a_cu
Config_version: V1.1.2
Image: thl.2015.167B.1478ZF.A1.150121.LWT_KK.FHD.WB128_
FB13720.EN.MV1616 – KTU84P – V1_CSFB
Note: Only for MT6752 + 2G Ram + 16G Rom + FHD
Project: bird6752_lwt_a_cu
Config_version: V1.1.2
Image: thl.2015.167B.1478ZF.A1.150121.LWT_KK.FHD.WB128_
FB13720.EN.MV1616 – KTU84P – V1_CSFB
Note: Only for MT6752 + 2G Ram + 16G Rom + FHD