Meizu Engineer / Factory
M1621 full Netcom public version Flyme7.3.0.0A (replace the motherboard)
M1621 full Netcom public version Flyme7.3.0.0A (used without replacing the motherboard)
Full Netcom Telecom Customized Version-Flyme 5.2.11.4Q-for board replacement
M1621 Full Netcom Telecom Edition-Flyme 5.2.11.4Q-no board change
M1621 Full Netcom Mobile Custom Edition-Flyme 5.2.11.4M-for board replacement
M1621 Full Netcom Mobile Custom Edition-Flyme 5.2.11.4M-no board change