Don't use it when signal strength is poor, since that means the phone has to work harder, causing it to emit more radiation.

手机信号弱时别用，因为那意味着手机工作起来费力，因而会放出更多的辐射。

youdao

However, your phone may look ugly because, perhaps because of poor signal, perhaps because the standby time is too short, perhaps because of frequent maintenance!

然而您的手机或许因为外观太丑，或许因为信号太差，或许因为待机时间太短，或许因为经常维修……这些都让您觉得美中不足却无法选择！

youdao