Samsung Galaxy Z Fold 7 said to be thinnest foldable yet – could be the breakthrough the market needs
Samsung’s next folding phone could take the form factor in a new direction


Quick Summary
A prominent leaker has claimed that the Samsung Galaxy Z Fold 7 will be the thinnest folding phone in the world, when it arrives later this summer.
It will allegedly measure just 3.9mm when unfolded and 8.9mm when shut.
Samsung is expected to launch the Galaxy Z Fold 7 and Z Flip 7 in early July at a summer Unpacked event, thought to be held in New York. We’ve seen plenty of leaks about the new devices, but the latest rumour suggests quite a change for the larger of the two devices.
The Galaxy Fold was Samsung’s first folding handset and one of the first book-type devices to come to market. Since then, Samsung has iteratively tweaked its best foldable phone from year to year. That’s seen fairly minor changes – but there could be a major shift coming with the Z Fold 7.
New information has surfaced from a reliable source, UniverseIce. Sharing the details on X, the leaker revealed that the Z Fold 7 will be the thinnest folding device on the market when it launches, saying it will be just 3.9mm when unfolded and 8.9mm, when closed.
According to some exclusive information, the next direction of Samsung flagship machine is still to be thin and light, and the battery will be thin and thin, and the body will continue to be thin. The Galaxy Z Fold7 will be the thinnest folding machine in the world at that time,… pic.twitter.com/uAs3NzAf8jMay 7, 2025
Currently the Oppo Find N5 holds that position of thinnest foldable, with a 4.21mm thickness when open and 8.93mm when folded. The interesting question will be how Samsung accommodates the USB-C port on its device, given that on the Oppo phone feels like there’s almost no metal between the edge of the port and the surface of the phone.
For reference, the Samsung Galaxy Z Fold 6 is 5.6mm thick when unfolded and 12.1mm thick when shut.
Galaxy Z Fold 7 battery changes
To support this move to a slimmer frame, the Z Fold 7 is said to come with new battery and charging technology – albeit 4,400mAh, the same as the Z Fold 6.
But while the capacity might be the same, the physical dimensions of the battery are likely to be smaller, so Samsung might be using new battery tech to fit this into the frame.
Sign up to the T3 newsletter for smarter living straight to your inbox
Get all the latest news, reviews, deals and buying guides on gorgeous tech, home and active products from the T3 experts
That could potentially mean using a silicon-carbon battery, which gives increased power density for the size. Ergo, the battery will be physically smaller. While new charging tech is also touted by the source, there’s no detail on what this might entail.
Samsung hasn’t booked in the launch event for its new folding phones, but there are rumours that it could be a bumper event, also giving us a glimpse at a final version of the Project Moohan headset too.
For now it’s a waiting game, but it will be exciting if Samsung does take the Z Fold 7 really thin, as it will set a new precedent for the segment and potentially make folding phones more appealing to a wider set of users.
Chris has been writing about consumer tech for over 15 years. Formerly the Editor-in-Chief of Pocket-lint, he's covered just about every product launched, witnessed the birth of Android, the evolution of 5G, and the drive towards electric cars. You name it and Chris has written about it, driven it or reviewed it. Now working as a freelance technology expert, Chris' experience sees him covering all aspects of smartphones, smart homes and anything else connected. Chris has been published in titles as diverse as Computer Active and Autocar, and regularly appears on BBC News, BBC Radio, Sky, Monocle and Times Radio. He was once even on The Apprentice... but we don't talk about that.
You must confirm your public display name before commenting
Please logout and then login again, you will then be prompted to enter your display name.
-
Samsung's 2025 TVs finally come to the UK – and get the seal of approval from a British institution
Samsung is now BAFTA's official screen partner, as it opens UK pre-orders for its new Neo QLED and OLED models
-
Samsung Galaxy S25 reportedly gets One UI 8 update already, with video showing several new features
You might still be waiting for One UI 7, but someone already has One UI 8
-
Samsung reportedly makes an impactful decision on the Galaxy Z Flip 7
And it might not please everyone
-
Samsung Galaxy S25 Edge launch date leaks again, but this time from a trusted source
It's time to get the diary out
-
Samsung's flagship phones will reportedly maintain one key advantage over iPhone
Apple is said to be struggling to match Samsung in a specific tech area
-
New Samsung Galaxy foldable launch event leaked
This could be the date the Z Fold 7 and Z Flip 7 arrive
-
Apple's iPhone just did something it never has before
This is an unprecedented event for the iPhone
-
Samsung hits pause on Android 15 rollout, but your phone might be lucky
Your delayed Samsung One UI 7 software update could be delayed some more