For BT problems try this: http://en.miui.com/forum.php?mod=redirect&goto=findpost&ptid=50604&pid=1666590
It works well with my Alpine CDE183BT and my Mi2S
Bluetooth works with 5.5.29 on Mi2S but when you listen to music with a bluetooth speaker, sound is bad.
Bluetooth calls work well, and everything else seems to work (my bluetooth gps works like a charm)
I flashed sMiUI 5.5.29 normal version on my Mi2S
Here are the bugs I found so far:
Can't access dialer from lockscreen (http://xiaomi.eu/community/threads/rom-kk-v6-smiui-5-5-29-aroma-init-d-multilang-center-clock-a-lot-more.25985/page-132#post-247805)
Can't enable data while roaming...
With 5.5.22 (Mi2S), bluetooth works, but I have poor sound quality when playing music in my car with my Alpine CDE-183BT.
Roaming bug is not fixed yet.
Currently it is not possible to use cwm or twrp with the new partitions. That's why we can't use aroma version.
http://xiaomi.eu/community/threads/rom-kk-v6-smiui-5-5-22-aroma-init-d-multilang-center-clock-a-lot-more.25985/page-125#post-247189
If you find any solution, please let us know!
Same problem with my mi2s: I merged the partitions, and then installed smiui with the updater.
Now I am on smiui 5.5.22 and I have no Gapps and no keyboard
I just found a workaround for mobile data while roaming! It should work on all lollipop versions for MI2(s).
To enable data while roaming open the file:
/data/data/com.android.providers.settings/databases/settings.db
as root with your favourite sqlite editor (I use SQLite Debugger, which works...