No luck today with the new iD SIM. The replacement service from iD is very good though.
On the plus side, 2 things:
1, Three have confirmed the issue with the certificate and say they're waiting for an update from Huawei, chances are that this will be in the form of a new firmware release, so you may or may not want to turn off the the automatic updates.
2, I came across the following YouTube while looking around the other day, it shows some Javascript code that can be used in Browser Bookmarks while logged into the router, it allows you to change bands and see the effects in a GUI above the router web pages. I've tried it out and it works, but the code in the video only works on Chrome AFAIK, although the original code from Github does work on Firefox. It took me ages to work out how to get code into a bookmark on Opera, the simplest ways I found were to import from Firefox or edit another bookmark, maybe just a learning exercise is needed.
Here's the YouTube link, it's in Italian and quite long, but I just ran it on mute and skipped forwards until I saw something interesting..
Here's the Italian code, it's in the video details too:
Here's the original GitHub code that the author forked:
Huawei LTE Band Selector. Contribute to ECOFRI/HuaweiLTEBandSelector development by creating an account on GitHub.
github.com
The Italian version allows you to see a map with Mobile Towers, they're all in Italy of course! But it may be possible to alter this to work with Cellmapper. The only thing that didn't seem to work was the indicator showing if you're on 3g or 4G, just to the right of the antenna info. The code uses the Huawei API which I'm guessing is what the other utilities like LTEH Monitor are doing. I'm not a JS expert, but from a quick poke through the code it looks like there's nothing dodgy going on but it's at your own risk.