Foldable smartphones have come on leaps and bounds in the past couple of years, and its arguably Samsung's Galaxy Z Flip line leading the way. Last year's Z Flip 3 sold millions of units worldwide, and while it was the best foldable around at the time, it still has some pretty undeniable flaws.
That's all changed with the Flip 4. While this is for the most part an iterative upgrade, it's one that's focussed on improving the battery life and camera performance that held last
