Download Android Jelly Bean 4.2.2 stock firmware for Maxx AX505 Duo smartphone from here or here. Download another Maxx firmware from here.
Archive: Maxx AX505 Duo
Firmware: Android Jelly Bean 4.2.2 stock
Project: ratech72_wet_rlk_jb3
Config_version: V1.1.1
Baseband: MT6572_S00_MOLY_WR8_W1315_MD_WG_MP_V1_P10
Archive: Maxx AX505 Duo
Firmware: Android Jelly Bean 4.2.2 stock
Model: Maxx AX505 Duo smartphone
Image file size: 382 MB
Platform: Mediatek MT6572Image file size: 382 MB
Project: ratech72_wet_rlk_jb3
Config_version: V1.1.1
Baseband: MT6572_S00_MOLY_WR8_W1315_MD_WG_MP_V1_P10