If you have ordered your Samsung Galaxy S9 or S9 Plus, you may want to consider getting cases BEFORE you get your phone and save a bunch of money by buying them online (as you will end up paying twice more at a retail store). Plus, the best S9/S9+ cases are usually found online. For this video overview, Ringke sent me all of their latest cases for the Galaxy S9 and S9 Plus. Amazingly, the cases fit perfectly on my Galaxy S8 and S8 Plus as they have exact same outer dimensions as the S9/S9 Plus. Of course, the only real changes this year is the new fingerprint sensor position and you may be able to re-use your older S8/S8+ cases by cutting a hole.
Most of these cases can be bought on Amazon for $10 USD so check them out below: