What is "@" "at" called when giving an email over the phone? Is it different in different regions? I have heard it as "XiaoLong ..." or something similar to that in Taiwan, but not sure what exactly they are saying.
It is very common in social media or IM that we just use the word 艾特, where you use @ to mention another user. Probably by doing so, that user will receive a notification. For example, we often say, "有消息记得艾特我。" If you use the default iphone Pinyin input and type "aite" the recommended words include "艾特” and "艾特我".