Ask how the next year will actually feel
If the phone is already borderline now, another year rarely feels like a great bargain.
Trade-in guide
This is really a value question: will another year of use be worth more to you than the trade-in value you could lock in now? The answer depends on whether the phone is still pleasant to use and how sharply that is likely to change.
Quick answer
Keeping the phone another year makes sense when it still feels solid today and is likely to remain acceptable for a while. Trading in now becomes stronger when another year is likely to feel noticeably worse and the current value still means something.
If the phone is already borderline now, another year rarely feels like a great bargain.
Losing some trade-in value is fine if the phone still gives you a good year of use.
Poor battery health is one of the clearest reasons not to bet on another year.
If you already know you will want a replacement within a year, waiting can be harder to justify.
Examples
If the phone still feels genuinely fine, one more year can easily be the better value play.
This depends on how much you trust the phone to still feel acceptable a year from now.
Another year is unlikely to be enjoyable enough to outweigh the value you are giving up.
FAQ
Often yes if the phone still feels good in daily use and you do not expect a sharp drop in usability soon.
Usually when battery decline, lag, or reliability are already making the phone frustrating today.
Both matter, but usability should lead. Keeping a phone only to save money is harder to justify if another year will feel obviously worse.