Is your modem this one: https://routerunlock.com/huawei-e3531-hilink-modem/
This is a hilink (hostless) modem so you should be able to set up as tethering.
Can you pls check if you can find the device here?
Is your modem this one: https://routerunlock.com/huawei-e3531-hilink-modem/
This is a hilink (hostless) modem so you should be able to set up as tethering.
Can you pls check if you can find the device here?