Hello,
first of all a big thank you to all developers.
Unfortunately I can not activate Mi Message for both sim. No matter what way I tried.
Mi 11 Ultra.
Greeting
In one of my posts, either here or last week (or week before) Weekly threads, I posted detailed (with screenshot) how-to DISABLE the annoying notifications about failing activation(s)
In a nutshell, Settings, Apps, enable System apps, find XiaomiSimActivateService, Notifications and disable its ACTIVATION notifications
Later I actually deblotead XiaomiSimActivateService - you can do that eg by adb (no root required) or by systemless debloating (root required)
I tried all and everything, but I could not make that XiaomiSimActivateService to work. In the same time, I can backup everything else (hence except those SMS messages) to MiCloud
And previously, when I was on stock EEA, I never had any problem with XiaomiSimActivateService, ie, I was able with no problems to backup also my SMS messages to MiCloud
I have problems with XiaomiSimActivateService on my Lisa only since I switched to Xiaomi.eu (Stable and Weekly)
IMHO, it could be something related to the fact that Xiaomi.eu is built on top of China ROM source, not on Global/EEA ROMs - I think, it does not send you some SMS to your international number (it thinks that you and the server are both in China and no international prefixes are needed or so, or maybe it wants me to send an SMS to China number and my mobile subscription does not allow me)
Anyway, when I was on stock EEA, I absolutely never had that problem - I never saw that failing activation notifications and backing up SMS to MiCloud worked seamlessly)