You have to pay
full price upfront for your phone or pay EMI's through your retailer, keeping in mind that carriers can not sell phones directly.
This means that, unlike T Bills, you pay
the full price upfront and then receive an interest payment every six months.
You have the option to pay
the full price upfront, or in two installments (50 % upfront, and 50 % one calendar month later).
However, for tablet, they need to pay
the full price upfront and they will not be happy if it ages.
You'll usually have to pay
the full price upfront, but some companies offer payment plans, so you can pay your phone off month by month.
The $ 100 discount will be automatically applied if you're paying
full price upfront, and if you're going the instalment route, the discount will be reflected in the form of bill credits.
You'll have to pay
the full price upfront for an unlocked model — either $ 999 for the 64 GB version or $ 1,149 for the 256 GB phone.
The iPhone X is available unlocked from Apple, giving you the option of paying
the full price upfront and taking it to the wireless provider of your choice.
Because the Mate 10 Pro isn't offered by a carrier in the United States — it's a long story — you'll have to buy the phone unlocked, which means paying
the full price upfront, unless you find a way to finance it through a third party.