Download Android Jelly Bean 4.2.2 stock firmware for Karbonn A6 smartphone from here or here. Download another Karbonn firmware from here.
Archive: Karbonn A6 4.2.2
Model: Karbonn A6 smartphone
Project: hexing72_wet_jb3
Config_version: V1.1.1
Baseband: MT6572_S00_MOLY_WR8_W1315_MD_WG_MP_V4_P7_1_2g_n
Archive: Karbonn A6 4.2.2
Model: Karbonn A6 smartphone
Image file size: 321 MB
Platform: Mediatek MT6572Project: hexing72_wet_jb3
Config_version: V1.1.1
Baseband: MT6572_S00_MOLY_WR8_W1315_MD_WG_MP_V4_P7_1_2g_n