YOU SAID:

I get a iPhone 12 if this gets 600 likes

INTO JAPANESE

これが600のいいねを得るなら、私はiPhone 12を得る

BACK INTO ENGLISH

If this is going to get 600 likes, I'll get the iPhone 12

INTO JAPANESE

これが600のいいねを得るつもりなら、私はiPhone 12を手に入れます

BACK INTO ENGLISH

If this is going to get 600 likes, I'll get the iPhone 12