Product Description:

• 【Compatible】 : Compatible with A21(US), Enlarged space for up to 3 cards. Also comes with 1pc tempered glass screen protector.
• 【Material】 : Samsung A21 Case anti-scratch Solid hard PC shell + shock absorbing TPU Cover, smooth touch feeling, elegant appearance, and quite easy to clean
• 【Precisely Cutting】 : Responsive control buttons & precise cut holes for mute button, speakers, charging port and camera
• 【Kickstand】 : The compartment flip is also constructed to function as a kickstand by locking itself for Samsung A21, convenient for movie-watching or video-chatting
• 【Card Slot Holder】 : Easy to take out your cards (ID, credit card, debit cards or cash)

Question:Do the cards fall out or does the case fall apart if accidentally dropped?
Answer:No it snaps and stays securely closed. 

Question:Popsocket able to be on this easily with no issue?
Answer:I put a popsocket on the center of the flap, and it's worked well for me.

Question:How many cards does it hold?
Answer:3 bankcards or 1 card, $ bill, & receipt.