<b>How to use the card holder:</b><br><br> 1.Use your finger to pry the door to open a little.<br> 2.Then slide the door to the right.<br> 3.Reach cards in the little notch in the top of the right corner.<br> 4.Take your cards out one by one.<br><br> <b>Frequently Q & A</b><br><br> <b>Q: </b>What phone does this case compatible with?<br> <b>A:</b> Samsung Galaxy S9 (5.8" display, 2018 released).<br><br> <b>Q:</b> How many cards can this case carry?<br> <b>A:</b> fits 2 ID-size cards perfectly, or 1 card + 1 folded bill.<br><br> <b>Q:</b> What's the trick to open the sliding door?<br> <b>A:</b> Use your fingernail or fingertip to pry the door open a little, then slide it to the right.<br><br> <b>Q: </b>What's the material?<br> - Inside: TPU (Thermoplastic polyurethanes), tough and not very flexible.<br> - Outside: PC (polycarbonate), smooth and resist scratches.<br><br> <b>Q: </b>How thick is the case?<br> <b>A:</b> Total high is around 1.5CM, with your phone in it. <br><br> <b>Q:</b> What if the case separated into pieces?<br> <b>A:</b> If 3 pieces are still complete, simply put them back together and it will just look like new. <br><br> <b>Q:</b> Does it come with the screen protector?<br> <b>A:</b> No. But there's a little lip in the front, and the case can fit with screen protector.<br><br> <b>Warm tips</b><br> - This case fits Galaxy S9 (5.8" display)only, does NOT fit the Galaxy S9 Plus (6.2" Display).<br> - Please buy a shatterproof screen protector to provide screen with further protection.<br> - Color might seem a little different on different devices, due to display settings.<br><br> <b>Package</b><br> Include 1 x case for galaxy S9 only, phone and other accessories not include.