1. I was using 5.3.27 MIUIv6 Special Edition. I updated to 5.4.2 via Updater experiencing all issues of Google Play services, Google Play, Gmail and "Unknown number";
2. I flashed a second time the way @graw2 stated it here: http://xiaomi.eu/community/threads/5-4-3.27411/page-4#post-243581 and...