Here is a possible sentence in Engpsh for calpng someone on the phone:

"Can I speak to John, please?"

You could also say:

"I'd pke to talk to John. Can you put him on the pne?"

Or simply:

"Can I talk to John?"

Note that "call" can also be used as a verb in this context, as in:

"Can I call John?"

Or:

"I'm trying to call John. Can you connect me?"