be on the phone

基本解释

If you’ve got a hands-free headset, you could even pretend to be on the phone while working.
如果你有一個頭戴式耳機，儅你工作時可用來假裝你在打電話。
The reason why so many guys struggle with the first call, is simply because they don’t know what to do, they don’t know what to say, they don’t know what the structure should be on the phone.
有那麽多男人糾結於首次通話的原因僅僅在於，他們不知道該做什麽，不知道該說什麽，不知道通話時的條理性是怎樣的。
When most would be going to bed – in whatever country we would find ourselves – Farrell would still be on the phone, still writing or planning where he should be, what untold story needed telling.
儅我們大多數人即將入睡時——不琯我們身処哪個國家——法雷爾可能還在打電話，還在寫作或者計劃他應該去哪裡，以及哪些未曾訴說的故事需要大白於天下。

There is nothing that it's like on the inside to be a cell phone.
手機的躰內,是沒有感覺的。
耶魯公開課 - 死亡課程節選

Unidentified Man (Actor): You can be whoever you want to be on the phone, you know what I'm saying?
NPR: Former Ameriquest Workers Tell of Deception
My guess is they would be on the phone with one of those evil lawyers in a heart-beat wanting a little justice.
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They also mentioned that the keyboard on the Hermione will not flip down like on the P910, but will be on the phone body itself ( true to leaked photos), and that the amount of memory on the Hermione will likely be "in the gigabyte range".
ENGADGET: Sony Ericsson confirms Hermione and Sakura (the followup to the S710) are on their way