I have a MiFi 4510L that does not work. It locks up multiple times a day, disconnecting the 2 PCs that use the MiFi as an access point. When it locks up, I cannot access the 192.168.1.1 configuration page, and the light on the MiFi will change from blinking green to solid green (4G) or blinking purple to solid purple (3G). The device is totally inaccessible until I reset it by holding down the power button.
I have updated the firmware to 2.28.02. I have tried using 802.11 modes g + b + n, g + b, n only, and g only with no change. 3G (3 bars) or 4G (4 bars) makes no difference. Forcing LTE only or CDMA only makes no difference. I have disconnected the battey and SIM card, waited 5 minutes, and reassembled. No change. I defaulted the device both with a paperclip and through the diagnostic menu with no change. WiFi signal strength on both PCs is excellent. Power management is set to never shut down as the device is always in the same spot with the charger plugged in, and is never mobile.
I am really fed up with this device, it really is not acceptable to have to reset it multiple times per day. What can I do from here?