How to activate NFC on my iPhone?

Hello irem225,

It sounds as though you're seeking to utilize a specific feature on your iPhone, but having difficulty finding it or using that feature. While there isn't a specific NFC setting, specific features can be turned off and on. What are you attempting to use on your iPhone? For example, are you attempting to set up and use Apple Pay? If so, you can find the steps for using Apple Pay in the following article.

How to use Apple Pay

If you're having issues with or needing assistance with a different feature please let us know in more detail about what's going on.

Have a great day!

What model of iPhone do you have?

iPhone XS and later do not have an NFC switch to enable NFC Tag reader.. NFC is enabled by default and cannot be turned off in those models.

iPhone 7, 8 and X have the switch in control center.

link-> iPhone User Guide - NFC Tag Reader - Apple Support