Free tools Windows power users keep installed

One-click scans. No signup required.

Special offer. See more information about Outbyte and uninstall instructions. Please review EULA and Privacy policy.

iTechGuides is reader-supported. When you buy through links on our site, we may earn an affiliate commission. As an Amazon Associate I earn from qualifying purchases. Learn more

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

  1. Hold the phone with its top edge facing you and look for the outline of the SIM tray.

  2. 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.

    Special offer. See more information about Outbyte and uninstall instructions. Please review EULA and Privacy policy.
  3. 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.

    #1 Best Overall
    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.

Rank #2
s21 Plus Single Sim Card Holder Replacement Tray for Samsung Galaxy s21 Ultra SM-G998B 6.8 inch,Sim Card Slot Also fit for Galaxy s21 Plus SM-G996,Galaxy s21 Tray (Black)
  • Compatiable model: s21 Ultra Sim Card Tray Replacement for Samsung Galaxy s21 Ultra SM-G998B 6.8 inch,Sim Card Slot also fit for Galaxy s21 plus SM-G996 -Black
  • Use: s21 ultra Card Tray will Replace you old/Broken/Lost s21 plus Sim Tray as new,Fit perfectly
  • Important:This Single s21 SIM Card Tray,not fit for Dual Version. Install Guild of s21 plus Sim Card Tray not include
  • Package Inlcude:1* Galaxy s21 Sim Card Tray +1* s21 ultra Sim Tray
  • Quality: s21 plus Card Tray being Strcitly check the Apperance/Color/Size before shippment,if unfortunately receive Quality SIm Card Tray or other Question,we will Reply online within 24hours.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Support on Ko-Fi

Safe handling when removing or replacing the tray

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.