This is the 732nd most frequent Hungarian word.
telefonon
"On the phone."
In this sentence, 'telefonon' means 'on the phone', indicating the means of communication.
A barátommal telefonon beszéltem.
I spoke with my friend on the phone.
Here, 'telefonon' is used to signify the device through which the message was received.
A telefonon kaptam egy fontos üzenetet.
I received an important message on the phone.
In this example, 'telefonon' refers to the medium used to take the order.