Foldable Android based smartphone from Samsung
The Samsung Galaxy Z Fold 3 (stylized as Samsung Galaxy Z Fold3, sold as Samsung Galaxy Fold 3 in certain territories) is a foldable smartphone that is part of the Samsung Galaxy Z series. It was revealed by Samsung Electronics on August 11, 2021 at the Samsung Unpacked event alongside the Z Flip 3. It is the successor to the Samsung Galaxy Z Fold 2.
In March 2022, Samsung rebranded the device as "Galaxy Fold 3" in certain Eastern European territories, potentially due to the Russian invasion of Ukraine and Russia's use of Z for military vehicles.
Specifications.
Design.
The Z Fold 3's outer display and back panel use Gorilla Glass Victus, whilst the foldable inner display is made of Samsung's proprietary "Ultra-Thin Glass" with two protective PET plastic layers covering it, the top of which is a replaceable screen protector.
The Z Fold 3 has an IPX8 ingress protection rating for water resistance up to and including full submersion for 30 minutes up to a maximum depth of 1.5 meters, with dust resistance not being rated. The outer frame is constructed from aluminum, marketed as 'Armor Frame' by Samsung, which is claimed to be 10% stronger than the Z Fold 2's aluminum frame.
Hardware.
The Galaxy Z Fold 3 has two screens: its external cover screen which is a 6.23-inch 120 Hz display, and its foldable inner screen which is a 7.6-inch 120 Hz display featuring support for the S Pen Pro and the S Pen Fold Edition; both of which feature support for variable refresh rate to help maximize power efficiency. 
While the inner display remained totally unchanged in its size and shape compared to the previous generation Z Fold 2, the external cover display was actually made ever so slightly wider by about +1 mm through a slight reduction in display bezel (making its aspect ratio ~24.5:9 vs the Fold 2's ~25:9), which as such also made it ever so slightly larger by about the same amount (~15.8 vs ~15.7 cm).
The device has 12 GB of RAM, and either 256 or 512 GB of UFS 3.1 flash storage, with no support for expanding the device's storage capacity via micro-SD cards.
The Z Fold 3 is powered by the Qualcomm Snapdragon 888, upgraded from the Z Fold 2's Qualcomm Snapdragon 865+.
The device's included battery is a 4400 mAh dual-cell that fast charges via a USB-C cable up to 25W, or via wireless charging up to 10W. 
The Z Fold 3 features 3 rear cameras, including a 12MP wide-angle camera, 12MP ultra-wide camera, and a 12MP telephoto camera, and features two front facing cameras, a 10MP selfie camera on the outer display, and a 4MP under-screen camera on the foldable inner display.
Samsung used to disable camera-related functions if the user attempted to unlock the bootloader.
This behaviour was changed with newer updates.
References.
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