I shall talk to you _____ telephone.

Explanation:

Correct Answer is: over

The phrase over the phone means that something is done using the phone as a way to do it. The following examples show how over the phone is used:

• She told him the news over the phone. [=she used the phone to tell him the news rather than telling him in a letter or in person]
• I am able to pay my bills over the phone so I don`t have to write checks.
• We ordered take-out over the phone before driving to the restaurant to pick it up.