The Galaxy Z Fold 7 finally proved Samsung has the chops to make an ultra-thin foldable. I used both the Galaxy Z Fold 6 and the Galaxy Z Fold 7, and the 8.9mm thickness of the latter made it feel like using a traditional smartphone for the first time, even when folded. Compared to the Galaxy Z Fold 4, the Galaxy Z Fold 7’s slim profile is a clear leap in every way but one — the older models were easier to open.Samsung’s new Galaxy Z Fold 8 Ultra is just as thin as the Fold 7, but it sports redesigned side rails with a subtle chamfer that makes them easier to open. The Galaxy Z Fold 7’s flat design worked when Samsung foldables were thicker. At their current sub-9mm thickness, a change was overdue.