Download Download 3G Ultra Firmware B2.3.9 Release Date 2023-07-10 Compatibility * B2.3.9 is fully compatible with all B2.x.x versions (B2.0.0 through B2.3.8) B2.x.x is incompatible with B1.x.x * B2.x.x operates on all 2GΩ/3G models and all 3G models * B2.x.x does not support backward compatibility…