Older firmware forces the dongle to use a single 4G band. Newer firmware often enables , allowing the dongle to combine Band 3 (1800MHz) with Band 20 (800MHz) or Band 7 (2600MHz). Result? Doubled download speeds (from 20Mbps to 50+ Mbps).
Flashing can sometimes wipe your IMEI number, causing the device to lose signal. Always try to back up your NV items using QPST before flashing. 4g Ufi Dongle Firmware
Before attempting to flash your 4G Ufi dongle, gather the following tools to prevent permanent damage to the device: Older firmware forces the dongle to use a single 4G band