What is the ruling on the conditions in the gold and silver mobile phone cards?

Question:
What is the ruling on subscribing to the gold and silver cards for the mobile phone, which is a subscription for two hundred riyals for two months? If the value expires before the two months, you get a reduction; if the value does not expire, it is lost and not counted for you, meaning what remains of it.

Answer:
Taking a card for the mobile phone or telephone for calls, where you pay its value for a month, for more or less, there is nothing wrong with this. There is nothing wrong with this because you are paying the value of the calls in advance, and it is limited to one month, two months, or less than that, or more, and it is specific with no ambiguity. There is nothing wrong with this due to people’s need for it.
As for saying that if such and such happens, it goes to waste for you, this is not permissible. This is a condition that is not permissible. But taking a card, using it for a period, then it ends, and then taking a second one, there is nothing wrong with that.