I gave my iPhone 5s for replacement

I'm not sure that what will they give me back A complete Box pack iPhone with accessories or only new iPhone

They may give you complete box with all accessories

May be they ll replace all the accessories and mobile with box… Or they ll just replaced the mobile and a new emei no bill and ll handle to you…

They only give back a new iPhone without any accessories.
The phone will be new with plastic around it in a very small box which they will likely remove it from to give to you.
Best of luck!