custom
are they natural?

1. That mobile is a custom version or in a custom version. (customized)
2. Her dad got her a custom version of the mobile phone (customized)
3. You have to pay customs or customs duty or customs duties for your iphone if you want to ship it back to China
4. You cannot take more than 200 cigarattes to get through the Customs.
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Thank you!

Question

custom
are they natural?

1. That mobile is a custom version or in a custom version. (customized)
2. Her dad got her a custom version of the mobile phone (customized)
3. You have to pay customs or customs duty or customs duties for your iphone if you want to ship it back to China
4. You cannot take more than 200 cigarattes to get through the Customs.
------
Thank you!

Answer

1. I am guessing "mobile" is British English. That sounds like something they'd say. In the States, we wouldn't use this term. We'd usually just say "phone". Anyway.... I think you should say "is running a custom version" if you are talking about software. If hardware, you'd just say "is a custom phone".

2. You'd say "a custom phone" or a "customized version of".

3. All of those seem fine. The last seems correct but I wouldn't use it.

4. "through customs"