No clear way to title this. Lets say you are on a Share plan on your brothers account. Your employer offers a discount but his doesn't and he is the primary person on the account. AT&T used to say that you would need to do a transfer of responsibility to your name for the discount to work. Plus if you had any NEXT plans, you would need to pay them all off in full before you could transfer. Now they have changed the rule. Anyone on the account who qualifies for an employer discount can apply that discount to the plan. 2 things need to be done. 1) You must be listed as an Authorized User (this can be done online or by phone) 2) Apply here https://www.wireless.att.com/business/enrollment/ The discount of 17% hit our account 3 days after I submitted, though it says it can take up to 2 billing cycles. $100 20GB plan is now $83 plus the savings on $17 worth of tax really helps. I was on the regular $100 10 GB plan but took advantage as others did last year when it was offered.