GEM420 Firmware
GEM420 4G Router is end of life since 2017 and the last version of firmware is available to download from the link below. There are no new GEM420 firmware versions and this product is no longer supported.
GEM420 Firmware – 20171024_GEM420-0BQ0TF0.1_0A1.0BQ1.1024-1722.bin