Just saying it should be easy to replace, I'd assume it's almost an identical process to the s6 and s7, however, be careful, if it's only 4 days old you should definitely still have a warranty. Best buy even covers the first 30 days if you got it there. I haven't seen any replacement parts for the s8 yet, and be careful trying to seal it. You may not still have waterproofing. Try claiming the warranty.