Hi. I have a hotspot for registering users.

When the user connects to wifi appears (automaticaly) a login (form) page for "user & password".
It is working very nice on most of mobile device, including Apple devices. The problem is with Huawei.
the user connects to wifi, and appears "connected", but never showed the login page.

then, if the user wants to use a app, he has not connection.
If the user enters to internet via browser, appears the login page, right now.

How can I to force open the login page in Huawei phones?