Yellular is the loudness one adopts in response to a bad cell-phone connection, in the misguided hope that talking louder will improve the connection.

Yellular指手机信号不好的时候提高音量讲话的状态，好像那样大声讲话手机信号就能变好一样。我们可以称为“喊叫模式”。

这个yellular其实就是yell(喊叫)和cellular的合成词，我们的手机正式叫法是cellular phone(蜂窝电话)，简称cell phone。

Sometimes, some people just cannot help yelling whenever they are on the phone, it seems that their voice is not transmitted through phone signal but via a speaker.

有时候，有些人只要一打电话就会开启大嗓门模式，就好像他们并不是靠手机信号来传输自己的声音，而是在通过大喇叭传话一样。

For example:

I'm so embarrassed. I went totally yellular at a restaurant last night. I was talking to my dad on the phone, but he just couldn't hear me no matter how loudly I spoke on this side.

昨天晚上我在饭馆打电话时直接进入“喊叫模式”，可尴尬了。我当时在跟我爸爸打电话，我在这边很大声说话，他也听不到。