If you are in Ukraine and need repairs on your Samsung device, Samsung Ukraine is meeting their customers needs by giving them a replacement phone while their phone is being repaired. The replacement phone is said to be one of the same that you already have and will be repaired at one of the ten centers listed below if the phone repairs are for more than one day:
Dnipropetrovsk, Donetsk, Zaporizhia, Lviv, Odessa, Simferopol and Kharkiv.

via: Samsung will give replacement phones whilst they repair your phone | Samsung Hub