Interface does not appear when connecting the Huawei me909u521 modem with sixfab LTE hat

I want to connect my Raspberry Pi 3 b+ to Internet through the LTE hat. When I connect my Quectel EC25-E there is no problem: the wwan interface directly appears. However, I have another modem (Huawei me909u521) which is compatible with the hat, but the interface does not appear. Should I do anything more? is not appearing directly and something more is needed?

Thank you

Hi @nfernandez,

Please contact Huawei support or ask the store where you brought the modem if they have newer firmware and documentation to establish and maintain a cellular data connection.