A telephone call; the act of calling someone. Also used as a noun that can take suru (to call).
昨日、友達に電話をかけた。
I called my friend yesterday.
重要な用件があるので、後で電話します。
I have something important to discuss, so I'll call later.
会議中は電話に出られないことが多い。
I often can't answer the phone during meetings.
The telephone device itself (often abbreviated as 'phone' in conversation).
家の電話が故障したので電話機を買い替えた。
The home phone broke, so I replaced the telephone set.
公衆電話はほとんど見かけなくなったが、緊急時には役に立つ。
Public phones are rarely seen now, but they can be useful in emergencies.
スマホは携帯電話の一種だが、日常では単に『電話』と言うことが多い。
A smartphone is a type of mobile phone, but in daily life people often just say 'phone'.