I just upgrade China version switch to sx os 3.0.5, and then upgrade firmware to 10.2.0 (download Official China firmware 10.2.0 from darthsternie, after all upgrade, switch boot is very slow, I can see the blue LED flash about 20 second and it is not boot successful every time. before upgrade, boot is very quick about 2-3 second. one more stranger thing is, for China version switch, there is game warning info when start any game, after upgrade, the warning info gone, excuse my English. Any help.