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The Galaxy S21’s SIM tray is on the phone’s top edge. It is not an SD-card slot: Samsung’s instructions identify it as a tray for nano-SIM cards and do not establish microSD-card support. Look for the tray outline and its small eject hole, taking care not to confuse it with the nearby microphone opening.
How to locate and open the Galaxy S21 SIM tray
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Hold the phone with its top edge facing you and look for the outline of the SIM tray.
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Identify the small eject hole in the tray. Samsung warns that a microphone opening is nearby, so check that the hole is part of the tray before inserting anything.
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Insert the supplied SIM ejector pin straight into the tray hole, perpendicular to the phone, and press gently until the tray releases. Ease it out rather than forcing it. Samsung’s Galaxy S21 Series handling guidance explains the ejection and cautions about the nearby microphone opening.
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PHONSUN Replacement Single SIM Card Tray for Samsung Galaxy S21 5G G991U / S21 Plus 5G G996U / S21 Ultra 5G G998U (Phantom Black)- Replacement single sim card holder slot tray socket for Samsung Galaxy S21 5G G991 G991U / S21 Plus 5G G996 G996U / S21 Ultra 5G G998 G998U smartphone
- Brand new. Repair replacement parts. Phantom Black color
- Compatible with: Samsung Galaxy S21 5G G991 G991U / S21 Plus 5G G996 G996U / S21 Ultra 5G G998 G998U. Single sim version
- Easy Installation: Just simply pop in and ready to go. Exactly same quality as OEM
- Contents: sim tray x 1 ; eject pin x 1
Can you put an SD card in the Galaxy S21 tray?
No SD card should be placed in the SIM tray. Samsung describes the tray for nano-SIM cards; the support instructions cited here do not establish whether the Galaxy S21 supports microSD expansion, so they are not enough to confirm that it does or does not. The important distinction is that the top-edge tray is for SIM cards, not a place to insert a storage card.
Which SIM cards fit, and what about eSIM?
Samsung’s UK instructions say supported configurations can accommodate up to two nano-SIM cards. On dual-physical-SIM versions, the tray’s two sides are marked SIM 1 and SIM 2. eSIM is also available where supported by the network. Configuration and availability can vary by regional model and carrier; see Samsung’s Galaxy S21 SIM installation instructions.
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Safe handling when removing or replacing the tray
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Use the correct tray hole and insert the ejector pin straight, not at an angle.
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Use a nano-SIM and make sure it sits firmly in the tray before reinserting it.
Rank #3
SaleBESJMYT Sim Card Tray Replacement for Samsung Galaxy S21 5G Phantom Gray- Compatibility: Suitable for Samsung S21 5G, the SIM card tray holder Replacement (Single SIM Version) fits models S21 5G SM-G991U, SM-G991U1. Make sure your device model is compatible with this product. You can check your phone's model in the settings by going to: Settings -> About Phone -> Model name/Model number.
- Easy Installation: The SIM card tray replacement for Samsung Galaxy S21 5G is a simple process. Just use the SIM card removal tool to replace the tray. There's no need for professional help, and the procedure is not complicated.
- Carefully Designed: Designed with precision, the SIM card slot for Samsung Galaxy S21 5G ensures a proper fit with your phone's SIM card tray holder. It has undergone rigorous testing for quality and size to meet the specifications of your device.
- Replace Damaged SIM Card Tray: Should your for Samsung S21 5G SIM card tray be damaged or not functioning properly, our product is a reliable option. Constructed with long-lasting materials, it offers extended use. The careful design ensures that the card holder stays firmly connected to the SIM card, reducing the risk of loosening or falling out.
- Packing List: The product bundle provides a SIM card tray and a removal tool, simplifying the process of replacing your SIM card tray.
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Do not reinsert a wet tray; Samsung warns that doing so can damage the device.
Quick Recap
Bestseller No. 1Bestseller No. 2Rank #4
PHONSUN Replacement S21 Sim Card Tray Dual for Samsung Galaxy S21 5G G991 / S21 Plus 5G G996 / S21 Ultra 5G G998 (Phantom Black)- Replacement dual sim card holder slot tray socket for Samsung Galaxy S21 5G G991 / S21 Plus 5G G996 / S21 Ultra 5G G998 smartphone
- Color: Phantom Black. Easy Installation: Just simply pop in and ready to go. Exactly same quality as OEM
- Compatible with: Samsung Galaxy S21 5G G991 / S21 Plus 5G G996 / S21 Ultra 5G G998. 2nd sim card will not work for a single sim model Galaxy S21, S21+ and S21 Ultra
- ATTN: All U.S carrier (Verizon, AT&T, T-Mobile, MetroPcs, Cricket...) version Galaxy S21 5G phones are single Physical sim card version, only the "SIM 1" will be read, "SIM 2" will not be read. Only the Dual physical Sim version Galaxy S21 5G (for example model number: SM-G991B/DS) will read the 2nd sim
- Contents: Sim tray x 1 ; eject pin x 1
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.

