I have Verizon, so maybe AT&T is different, but afaik the plan has to be in your name to do it, and you can just take paystubs into your local store instead of calling.
		
		
	 
Im on verizon too, I took in my pay stubs and they said we have to fill out a form from our HR (EHR has a link to it, its electronic) in order to get it applied.  not sure if it works this way on other carriers too
		
 
		
	 
I got an email from Verizon a few weeks ago asking me to re verify my employment, all I had to do was include a screen shot of a recent paystub with the date on it and submit it in an online form
This is how it was done back when I did my original discount with Verizon.  There should be a link in the employee discounts spot on the Target login... once there if you log into your Verizon wireless website (or w/e carrier) there should be a way to do it that way.  I know you can also take things to the store to have it done, but for me the online was really fast....  And the nice thing is.. I left Target back in September of 2011 and my Target discount is still on my Verizon account 
🙂...