Download Android KitKat 4.4.2 stock firmware for Uhappy UP550 smartphone from here or from here. Download another Uhappy firmware from here.
Archive name: UP550_AJX_V2.0 (1).4_0828 / X3S_AJX_V2.0.4_0828
FW version: Android KitKat 4.4.2 stock firmware
Archive file size: 414 MB
Model: Uhappy UP550 smartphone
Platform: Medatek MT6582
Project: i31_anjuxin
Config_version: V1.1.1
Baseband: MT6582_S00_MOLY_WR8_W1315_MD_WG_MP_V39_P1_1_wg_n
Baseband: MT6582_S00_MOLY_WR8_W1315_MD_WG_MP_V35
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