How can I increase the WiFi client limit on a Huawei B153?

I know this question is quite old and probably of no more interest to the author, but maybe somebody else may stumble over this via a web search just like i did, so i wanted to share my findings.

I actually have 2 of these WebCubes, one which is newer, does not have this 5 device limit, the older one did. I was able to change this configuration and it also persisted restarts.

The way i did it was completely different, i only used the web administration interface. My version displays a field there which says something like "maximum number of devices" (not literally), this can be found somewhere in the wifi settings. When i entered something bigger than 5, i think it was immediately reset by some javascript, as far as i remember, or at least it was reset when you submitted these changes. So i dug in the JavaScript code of the site (with Chromes dev utils, which you get when pressing F12), and found that the submit method of the HTML form had this code somewhere which changes the value back to max. 5. I tried to change that and it sort-of-worked, the problem is that there is also some kind of ajax thing going on which constantly does some reloading and somehow messes with these manual edits, but after some trial and error, i was able to time it or stop it somehow, that it worked and it really submitted the other value (i think i set it to 10). After that it showed 10 when i visited that page (have not dared to touch it since).

I guess this could also be done via curl or some similar utility, but because of the javascript stuff that happens when submitting the page and cookies etc., i thought it would be easier this way.

Sorry that i can't give any more detailed info, but it's really some time since i did that and i currently don't have access to this device to look for any specifics.

As said before, this worked on the older version of my 3WebCube, since the newer one came with a 10 device limit by default, i haven't tried it there.