iPhone replacement

Hello, I purchased an iPhone 13 pro about 6 months ago and since the very beginning of my journey with this phone anything related to the gb, or to calling has been lagging all the time, it shuts off and on all the time whether im in a call or not, and when I am in a call it disconnects me from the call and is temporarily shut down, I don’t know what the issue is exactly but I have received my phone with this issue, I have not damaged it or done anything potentially damaging to the phone, I have been delaying checking the phone at my nearest apple store because of how busy I was the past few months and I finally have time to do so, so my question here is, will the store provide me with a free replacement since this isn’t my fault and I paid for a fully functional phone ? And if so will they be able to transfer everything I have on this phone to the new one ? Or will they just offer to fix it with a price included?

thank you.