Update reset the modem’s radio profile or APN. Fix: Manually re-enter APN settings. Also, try removing the SIM card, rebooting, then reinserting the SIM.

Connect your laptop or smartphone to the Tenda 4G180 Wi-Fi network.

Firmware updates often refine how the internal antennas handle 4G/3G handoffs, reducing those frustrating "connected but no internet" moments.