The warranty period

保修期

It's the latest and quite popular among young people.

这是最新的产品，很受年轻人的欢迎。

Yes, I know and I like it very much. I will take it.

是的，我知道，我非常喜欢它，我买下了。

Sure. Here is your receipt.

好的，给您发票。

How long is this cell phone guaranteed?

这个手机的保修期是多长时间？

You can refund it in 7 days and exchange it in year.

七天内保退，一年内保换。