Berlin-L21C464B145
Berlin-L21-C00B172_Firmware_China_Nonspecific_Board Software_general_Android 6.0_EMUI 4.1_05013QEU
Berlin-L21 HL2BLNTMBD001031_Board Software_general_05021YGY
Berlin-L21 HL2BLNTMBD001051 Board Software (SKF - Flasing By Sigma Key)