Which is the phone 5se? Thank you

There never was an iPhone 5se. There was the iPhone 5s and the iPhone 5c, followed by the iPhone SE introduced in 2016. There is a second generation iPhone SE that was introduced in 2020.

But Apple never produced nor sold any model called “iPhone 5se”. The SE model designation never had any number associated with it.

There isn't an iPhone 5se; the 5s and SE are different models.

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To find out what model iPhone you have........

Home Screen > Settings > General > About > Model Name