A 120Hz phone can make scrolling and transitions feel smoother, particularly if your current phone lacks a high-refresh display. But a used device is not worth buying for the label alone: faulty touch, dim output or a worn battery matter more. See and touch the individual phone before deciding what the upgrade is worth.
1. What changes at 120Hz?
More frequent display updates can make long scrolls and interface movement look more fluid. This is separate from network speed, sharpness and colour. A 30fps video remains 30fps source material; a 120Hz panel cannot create original frames in every clip.
Apple describes iPhone 15 Pro ProMotion as adaptive refresh up to 120Hz. Samsung specifies a 48–120Hz adaptive range on Galaxy S23. “Up to” matters: neither device must remain at 120Hz on every screen all the time.
2. Try your most frequent actions
Open the same long page on two phones and scroll at a normal pace. Switch between photos, messages and the Home Screen. If you read long documents, the feel may be worthwhile. If you mainly call or watch ordinary video, paying extra solely for 120Hz may matter less.
For games, check the game, its settings and whether the phone sustains real performance. A 120Hz screen does not make every game run at 120fps at every quality level; heat and battery can also affect longer sessions.
3. Inspect the individual used panel
Show light, dark and simple colour backgrounds to look for marks, tint or image retention. Test touch around all edges and corners, outdoor brightness, automatic brightness and the glass. A high refresh rate cannot hide a damaged or unexpected replacement panel.
Ask about repairs and inspect parts information where the operating system provides it. Record the condition confirmed in the order rather than relying on a promotional video of another unit.
4. Balance smoothness against the rest
Adaptive refresh lets a device respond to content, but battery life also depends on brightness, signal, workload and the health of a used battery. Do not assume two similarly sized phones last equally long, or that every 120Hz phone necessarily has poor endurance.
Weigh display feel against camera, storage, hand comfort and price. Smooth scrolling is only part of a day with the phone; a better-fitting device with a healthy battery may be the wiser purchase.
5. Compare listed options honestly
The used iPhone 15 Pro has ProMotion in Apple specifications, while Apple does not list it for the used iPhone 13. The used Galaxy S23 also offers adaptive refresh up to 120Hz according to Samsung. They differ in much more than their displays.
At TECHBUY, test the actual unit, storage variant and battery condition. Choose 120Hz if you notice the benefit in daily actions and the whole phone fits your needs, not for one number alone.
Conclusion
A smoother panel is worthwhile only when the panel and the rest of the device are in good condition. Sources: Apple iPhone 15 Pro specs, iPhone 13 specs and Samsung Galaxy S23 specs.
