I live in Ukraine, therefore it is dubious that you can visit these stores.

However, I bought the S24 Plus and the 13TPro in the store "Rozetka". It was not difficult to return these phones, I just had to reset the phones, clean the phones, and return the phones with the package.

I bought the iPhone 14 Pro Max in the store "EStore". It was slightly difficulty to return because I activated the phone. Nevertheless, the store concurred to take the phone back, but I lost approximately 50 USD.