YOU SAID:

Things have been really good ever since I got a smartphone

INTO JAPANESE

スマートフォンを手に入れてからずっと良かった

BACK INTO ENGLISH

It has been good since I got my smartphone

INTO JAPANESE

私は自分のスマートフォンを手に入れてからそれは良かった

BACK INTO ENGLISH

It was good since I got my smartphone

INTO JAPANESE

スマートフォンを手に入れてから良かった

BACK INTO ENGLISH

It was good to get a smartphone

INTO JAPANESE

スマートフォンを手に入れてよかった

BACK INTO ENGLISH

It was good to get a smartphone