标题有误导性啊。小字节选： Activate/keep postpaid eligible unlimited wireless service (min. $75/mo. for new unlimited customers before discounts). AT&T may temporarily slow data speeds if the network is busy.
Requires a qualifying 0% APR installment agreement (36-mo. term from $28.89/mo. up to $30.56/mo. based on device purchased) Other installment options may be available and vary by location.
If you cancel wireless service, your credits will end and you’ll owe the remaining balance on the installment agreement for the device purchased. For new lines, if you cancel service on any other line on your account within 90 days of activating the line under this offer, device credits will stop.
To get all credits, the discounted device must remain on installment agreement with eligible service for entire installment term. If you upgrade or pay up/off the installment agreement early, your credits may cease.