What is the operating system of a mobile phone call?

你的手机操作系统是什么？

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A mobile phone call in Somalia is typically less expensive and higherquality than any other in Africa.

手机在索马里比在非洲任何其他地方都要更便宜和质量更好。

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Anyone trying to just make a mobile phone call in a remote area in Australia could perhaps attest to that.

在澳大利亚偏远地区想打电话的人或许可以证明这一点。

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Now granted we're now starting to take this all shuttle theme to an extreme perhaps, but we realized you know what, it's actually not that efficient sometimes to call a phone number, it's not that efficient to pull up the mobile web.

我们现在都已经习以为常了,我们都认为极为平常了，把这些关于班车的程序做的很好了,但我们有些时候拨打一个电话，或上一下移动网络。

哈佛公开课 - 计算机科学课程节选

It claims that the cost of a mobile phone call has fallen by 70% since the single market came into operation, and the cost of a plane ticket has fallen by 40%.

BBC: Cameron EU speech: Business leaders give mixed messages

The proposals to be brought forward would address the fact the police - who can already tell when, where and who made a mobile phone call or sent a text message - cannot always trace the origin of an email, a message sent via instant messaging or a phone call made over the internet.

BBC: 'Fresh proposals' planned over cyber-monitoring

On Thursday - 48 hours after the attack - the BBC's Kabul bureau was contacted by the Taliban and I was given a mobile phone number to call.

BBC: Afghan 'killer' of UK troops tells BBC he acted alone