I have just purchased a supposably out-of-the box iphone 7 today, but i noticed it was running ios11. Does that mean this phone is used?

Iphone7 was released in september 2016
Ios11 got announced in 2017

Read more: I have just purchased a supposably out-of-the box iphone 7 today, but i noticed it was running ios11. Does that mean this phone is used?