Selling a mobile
    phone for which the purchaser pays in installments, from which the vendor pays for the
“smart card”
Question

                There are some companies which sell
      mobile phones in the following way:The two parties agree that the company will sell the individual a
      mobile phone, and will obtain a “smart card” from the telecommunications
      company, all for a total price of 5000 riyaals, of which the vendor will pay 3000 riyaals
      to the communications company in return for a “smart card” in the name of the
      purchaser. One thousand riyaals covers the price of the phone itself. The total figure is
      to be paid in monthly installments.Is it permissible for the company to sell in installments before they
      bring the card to the purchaser, knowing that they do not actually own the card?
Praise be to Allah.We put this question to Shaykh Muhammad ibn Saalih
    al-‘Uthaymeen, may Allaah preserve him, who answered as follows:
It seems that this is not permissible, because the purchaser is telling
    the vendor, Lend me the cost of the “smart card”, then I will pay you back with
    something extra. This extra amount is ribaa (usury/ interest). But it is permissible to
    sell the phone on its own by installments, because the vendor actually owns it.
Question: what if he says, Give me the extra amount for the phone?
Answer: it does not work this way, because the extra amount is being
    paid for the whole package. This is haraam, and he should buy the “smart card”
    with his own money (i.e., the purchaser).
Question: does this come under the heading of two contracts in one?
    Could the relationship between the purchaser and the vendor (with regard to the
    “smart card”) be that of delegating someone to do something and paying him for
    his services?
Answer: No, because every contract should be dealt with individually.
    The first contract is with the telecommunications company and the second is with the
    company (which is selling the phone) – and this is not permissible. It is as if they
    are giving him (the purchaser) a loan, which they then give to the telecommunications
    company, then they are asking for extra repayment. And Allaah knows best.