The double-folding device looks to be in the prototype phase, as the folding creases are still visible. In its default state, the screen seems to have a 3:2 ratio, while the folded state shrinks down to a 2:1 ratio. What really impresses is the responsiveness of the Android interface that immediately snaps into the new ratio as the phone enters in the folded state.
https://www.notebookcheck.net/Xiaomi-co-founder-presents-double-folding-smartphone.397281.0.html
The idea is good but this implementation is crap. The device is way too small both as a tablet and as a phone. This makes no sense. Hopefully they'll come with a more sensible device....
This for peoples buying xiaaomi phone, please be aware that after sales, they dont test the updates of security patches and bugs, they send faulty updates with lots of bugs, If you want to check this then go to MI Community and see the users Post about the bugs in updates for MI A2. The MI A2 users are facing so many problems from 2 months but still Xiaomi has not fixed the bugs till now and they are sending faulty bugs