Yesterday I updated to 10.3.8.0 EU, I was on 9.6.27, but I did clean flash. Everything work, installed all app, no problem. So toninght I opened the app vodafone to open the chest called "Shake IT", but it show me the error external link. I thought its a problem with vodafone server, ok no problem. Today I try to open again, the problem still there. Then I remember to turn on the wifi and try, and it work! Ok, back and turn off the wifi, the problem still appear. then I go to app and grant all permission, even app, network usage etc etc. but the error still there. Ok, i go to the network setting on information SIM card, it was on "GSM/WCDMA/LTE", I tried to "GSM" to see if it communicate with external link, and it communicate but too slow, then I try "TD-SCDMA/GSM/WCDMA/LTE" and it work! its a bug? I think I don't need "TD-SCDMA"? I am from Portugal and on 9.6.27 I never had this problem.
Or this problem is for official MIUI (no EU) ?