With the circulation of the hardware specification leaks of the Xperia Z4 on the internet, many Sony fans wasn’t impressed by the little makeover in the hardware. However, we discovered that Sony has been planning to release more variants of the Xperia Z4 on an Indonesia site.
Based on the news above, there are 4 different models of new Sony mobiles that has been registered for copyright in Indonesia. The model number, E5803 along with other variants has a similar model number as the previous Xperia Z3 Compact (D5803) and other variant. Thus we would speculate that these models refers to a successor of the Xperia Z3 that could be the Xperia Z4.
Although we couldn’t justify and confirm the real model name behind these model number, it is highly likely that those belongs to a variant from the Xperia Z4. The little makeover on the Xperia Z4 could indicates that Sony is preparing to release something bigger and better flagship in this year.