en_tn/1co/15/52.md

We will be changed

AT: "God will change us" (See:rc://en/ta/man/translate/figs-activepassive)

in the twinkling of an eye

It will happen as fast as it takes for a person to blink their eye.

at the last trumpet...the trumpet will sound

The blowing of a trumpet often precedes major events. In this case it will be the final major event in earth's history that Paul is referring to.

this mortal must put on immortality

God will change our mortal bodies to immortal bodies.