KuWFi 300Mbps 3G 4G simcard lte moden

This is not for a company it’s for myself it’s a ec25 lte sim card modem I bought off Amazon …
KuWFi 300Mbps 3G 4G so I can get internet from lte cell towers when I travel in my rv the Product model: WE826-T2 I have not been able to upgrade it since I bought it in 2019 … keep getting this message…Current firmware version:19.1101(2019-11-01 23:35:31)Latest firmware version :The latest version was not detected

Hello, could you use USB or UART port to connect the module? If yes, I think I can send the upgrade package to you and then upgrade locally.