What is the ruling on the topic concerning mobile phones?

Marriage is not valid if it is contingent upon a future condition, such as saying "if you grow up" or "if you get yourself organized," because marriage is not made contingent on a condition like contracts of exchange. In addition, the unity of the contracting session is a prerequisite, and a marriage contract cannot be concluded over the phone due to the absence of this condition. Therefore, what transpired between the questioner and his colleague is not considered a legitimate marriage contract, and its effects do not apply.