If your primary goal is to use different SIM cards, you may only need to unlock the device rather than fully flashing new firmware:
Also check support archive (they once released generic MF90 firmware for open market). zte mf90 firmware no brand
If your original carrier shut down its 3G/4G network (e.g., some regional carriers), the branded firmware might display “no service” even if another carrier’s SIM has a strong signal. Unbranded firmware properly rescans networks. The Ultimate Guide to ZTE MF90 Firmware: Removing
Unbranded firmware, often referred to as "generic" or "stock" firmware, replaces carrier-locked software with the original manufacturer version. This typically provides: Universal SIM Compatibility: Unbranded firmware, often referred to as "generic" or
An refers to the manufacturer’s original firmware, stripped of carrier customizations. This write-up explores the motivation, process, and considerations for flashing such firmware.
Gain manual control over frequency bands (forcing LTE-only or 3G-only) and manual APN editing. Battery Optimization:
– In some cases, carrier firmwares lag behind in updates. Unbranded versions may include newer modem firmware or bug fixes.