you cant :(
It is possible to tag people from the Facebook mobile app on android phone. To tag a person in a status, a person just needs to type the name of the person and press Enter, and the person will be tagged in the status.
To mention or tag someone, include the @ in a status or post.
Unfortunately, you cannot tag someone in your status updates, pictures, or anything else from the iPhone. You would have to log on to Facebook from a regular computer to tag friends.
You can't.
apparently you cannot..
input device
RFID tag
If you mean tagging someone in your status, then you have to put @ and then write their name and it should come up on a list. Its pretty easy. Or if you want to tag them in a picture, underneath the picture on the right it will say something like 'tag this photo' click on that and then click on the picture, and it will come up with a box. Just type the name is. its pretty simple. Hope I helped! :)
tag them in it!
You type @ before their name, with no spaces. Once you start typing, a drop-down box will appear with matches, and you can simply click on the person's name.
Status Kill - 2012 Don't Tag Me Bro 2-2 was released on: USA: 8 August 2012
There are a majority of people on the interwebs who cannot tag in their statuses, but the majority who can tag their friends by typing the symbol @ before typing a friend's name. For example: To tag Fishie Gerber, you type... is having fun with @Fishie The tag selection will come up, then select Fishie Gerber, and it will come up as "Rumble Jelly is having fun with Fishie Gerber" and the tagged friend's name will be linked to their profile.