If you need to change the time, please feel free to call me on my cell phone.

如果您需要更改时间，请随时打我的手机。

youdao

I don't speak English and I need help. If you have a cell phone would you please call my son at XXXXXX briefly, so that I can let them know my situation?

我不会英文，我需要帮助，如果你有手机能请您给我儿子打个简短的电话到xxxxxx好吗？那样我就可以告诉他们我们的情况。

youdao

Please give me a call (my office and cell phone numbers are below) or drop me an email at your convenience.

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