I am trying to replace my dying Samsung Galaxy Note 9 and have Sony Xperia 1 III high on my list. Is there a 512GB variant for Europe (XQ-BC52) ? If so, where can I find it ? Alternatively, can I use a US or HK variant in Europe (that is, IF I can find 512GB versions of them here) ? I don't wish to downgrade to 256GB and I do need dual SIM.