onece you get used to it : At the Beach 6

　 Oh, it's alright, once you get used to it.
　　一度慣れちゃえば、大丈夫だよ
■ It's ～, onece you get used to it ■[]一度慣れてしまえば、～です

　→The internet is easy, once you get used to it.
　→Once you get used to mobile phones, no longer to be able to be without it.