I couldn't find much info about HUAWEI BM632w but most of Huawei's devices run a very closed software. Its pretty hard to have startup scripts with such devices.
My best guess to why you would want to do such a thing would be to find out the IP address that was assigned to this device, remotely so you could get in and do some stuff. Correct me if I'm wrong here.
See if this device has any options related to dynamic dns in the settings to help you out. I don't suppose you can get a static IP from the ISP with wireless internet. If you do end up having a dynamic dns or a static ip setup, you could have some kind of script somewhere on remote servers to periodically pool data / ping from that location to see if the device is online.