New update:
Sony has recently launched the Sony Xperia 5 (J8210 and J9210) handset with flagship-grade specifications over the Android 9.0 Pie out-of-the-box. It has a triple rear camera setup, a 21:9 aspect ratio Triluminos display, SDM855, single-SIM & dual-SIM variant, a decent battery, fast charging support, and more. Now, the handset is getting the latest software update in some specific regions. It’s worth mentioning that Sony Xperia 5 Software update receives its first software update.
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Check for OTA Updates Manually
In order to update your Xperia handset, go to the Settings menu > About phone > Software update. Then follow the on-screen instructions if any update is available. You can also update it with a computer using the Xperia Companion tool.

Make sure that your device should be connected to a working Wi-Fi network and charge up to 60% at least for a smoother process. The firmware OTA update is rolling out via batches in some regions and will take some time to receive on all Xperia 5 variants globally.
Sony Xperia 5 Specifications: Overview
The Sony Xperia 5 comes with a 6.1-inched OLED Full-HD+ display with a resolution of 1080×2520 pixels along with a 21:9 aspect ratio. It runs on Android 9.0 Pie and Snapdragon 855 SoC, coupled with Adreno 640 GPU. While the handset packs a 6GB of RAM and 128GB of internal storage option that can be expandable up to 1TB via a MicroSD card.