The alleged Sony Xperia Z4 Compact, Z4 Ultra were found in an Indonesian Telecom regulatory list. Based on this particular, the Xperia Z4 Compact and Xperia Z4 Ultra are expected to make first appearance in the near future.

Sony Xperia Z4 Compact, Z4 Ultra visits certification list

Sony E5803 model number directly matches to the successor of the Z3 Compact D5803 and will likely be named Xperia Z4 Compact. Similarly, E6683 and E6883 model numbers could have a direct relation to Sony Xperia Z Ultra C6683/C6803.

Just a couple of days ago Sony silently announced its flagship Sony smartphone Xperia Z4 in Japan. We can now believe that some other flagship is just to embark on various market.