Here are a few options for drafting text around a firmware link
Do disconnect the USB dongle during the process. The lights on the modem will blink and turn off temporarily. Wait until the tool shows a "Success" or "100%" message. Zte Mf79u Firmware LINK
Possibly. Newer firmware includes better band scanning, but your physical hardware limits maximum speeds (Cat4 LTE, up to 150Mbps down). Here are a few options for drafting text