手机用英文怎么说

"手机用英文怎么说" can be translated into English as "What is the name for a cellphone in English?".

If you need to know the exact translation of "手机", it is "mobile phone" or "cellphone". However, if you want to ask about the usage of mobile phones in general, you can say "How do you say '手机' in English?" or "What is the English term for a cellphone?".