What is the Sharia ruling on commercial deals made over the phone?

Scholars have differed on the ruling concerning the sale of an unseen item, holding various opinions. The most preponderant among them is the permissibility of such a sale, provided that the buyer retains the option (of annulment). They based their arguments on the generality of Allah Almighty's saying: (Allah has permitted trade and has forbidden interest), and on the hadith (definition) about the transaction between Uthman and Talha, may Allah be pleased with them both. This indicates the permissibility of concluding commercial deals over the phone, with the buyer retaining the option after seeing the merchandise.