Questions & Answers about Yeni telefonunu güle güle kullan.
It is a very common Turkish well-wishing phrase. You say it to someone who has bought or received something new. Literally, it is something like use it happily / smilingly, but in natural English it works more like Enjoy it or Use it in good health.
So even though kullan is grammatically an imperative, the whole sentence is really a friendly wish, not a harsh command.
telefonunu can be broken down like this:
- telefon = phone
- -un = your
- -u = accusative ending
So here it means your phone as the object of the verb.
One useful extra note: this exact form can also mean his/her phone in some other contexts, but in this sentence the meaning is clearly your phone.
Because kullanmak means to use, and here phone is the direct object of the verb.
In Turkish, a specific direct object usually takes the accusative ending. So:
- telefonun = your phone
- telefonunu = your phone as the specific thing being used
That is why the extra -u appears.