Although the Sony Xperia XA2 arrived in January 2018, it seems that its successor will hit the market before the end of the year. A handset that is rumored to be the upcoming Xperia XA3 was recently spotted on Geekbench as the Qualcomm Snapdragon 660-powered Sony H4493. This handset sports 6 GB of memory and runs Android 8.1 Oreo.
https://www.notebookcheck.net/Qualcomm-Snapdragon-660-powered-Sony-Xperia-XA3-hits-Geekbench.323370.0.html