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Sorry to call you when you are busy.
I'm calling about the estimate.
Phone manners decide the first impression of a company.
I'm calling because I have something to confirm.
For phone inquiries, please call this number.
I'm calling about tomorrow's meeting.
We also take orders by phone.
Is Mr. Tanaka available to take a call?
Answer the phone within three rings.
I'll call again another time.
Please answer customer calls politely.
Around what time can I reach you by phone?