引用EU MIUI digeratz的文如下 Just to add more information on this issue. There are several users who posted in this thread who failed to update 11 Utra from China 12.5.2 to EU 12.5.
So far the following versions failed in 11 Ultra to EU: CN 12.0.1 to EU 12.5 CN 12.5.xx to EU 12.5
Success for the following versions: CN 12.0.13 to EU 12.5 Global 12.0.1 to EU 12.5
D:\xiaomi.eu_multi_MI11Pro_MI11Ultra_V12.5.2.0.RKACNXM_v12-11-fastboot\platform-tools-windows>fastboot getvar current-slot current-slot: b Finished. Total time: 0.003s
D:\xiaomi.eu_multi_MI11Pro_MI11Ultra_V12.5.2.0.RKACNXM_v12-11-fastboot\platform-tools-windows>fastboot set_active a Setting current slot to 'a' OKAY [ 0.034s] Finished. Total time: 0.038s
D:\xiaomi.eu_multi_MI11Pro_MI11Ultra_V12.5.2.0.RKACNXM_v12-11-fastboot\platform-tools-windows>fastboot getvar current-slot current-slot: a Finished. Total time: 0.008s