{"id":21256,"date":"2025-10-18T13:56:38","date_gmt":"2025-10-18T13:56:38","guid":{"rendered":"https:\/\/mobilemall.co\/blog\/?p=21256"},"modified":"2025-11-11T09:13:36","modified_gmt":"2025-11-11T09:13:36","slug":"samsung-galaxy-sim-card-not-detected-step-by-step-fix-for-one-ui","status":"publish","type":"post","link":"https:\/\/mobilemall.co\/blog\/samsung-galaxy-sim-card-not-detected-step-by-step-fix-for-one-ui\/","title":{"rendered":"Samsung Galaxy SIM Card Not Detected? Step-by-Step Fix for One UI"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\"><span style=\"text-decoration: underline;\">Key: Hold <strong>Volume Down + Power<\/strong> button together for <strong>7 seconds minimum<\/strong>. Phone will restart. Check if the SIM error cleared.<\/span><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Your Samsung Galaxy showing <strong>&#8220;No SIM&#8221;<\/strong> or <strong>&#8220;SIM Not Detected&#8221;<\/strong> even though the card is in the tray? Follow these steps in order. <strong>Start from the top and work down<\/strong> until your SIM is detected.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-step-1-force-restart-your-phone\">Step 1: Force Restart Your Phone<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Hold <strong>Volume Down + Power<\/strong> button together for <strong>7 seconds minimum<\/strong>. Phone will restart. Check if the SIM error cleared.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>If error persists<\/strong>, move to Step 2.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-step-2-reseat-the-sim-card\">Step 2: Reseat the SIM Card<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Power off completely<\/strong> (don&#8217;t just restart).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Use the SIM ejector tool or straightened paperclip. Push into the small hole on your phone&#8217;s edge until the tray pops out.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Remove the SIM card<\/strong>. Check the gold contacts for:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Fingerprint smudges<\/li>\n\n\n\n<li>Scratches<\/li>\n\n\n\n<li>Corrosion or discoloration<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Wipe the SIM gently<\/strong> with a microfiber cloth. Not tissue &#8211; it scratches.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Check the tray for bent pins or debris.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Put the SIM back in the tray<\/strong>. Make sure it sits flat, gold contacts facing the right direction.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Slide the tray back in<\/strong> until it&#8217;s completely flush with the phone&#8217;s edge. Zero gap.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Power on. Test.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Still not working? Step 3.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-step-3-test-your-sim-in-another-phone\">Step 3: Test Your SIM in Another Phone<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Put your SIM card in a different phone<\/strong>. Any phone that takes the same size SIM.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>If the SIM works in another phone:<\/strong> Your SIM is fine. The problem is your Galaxy phone&#8217;s hardware or software. Continue to Step 4.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>If the SIM doesn&#8217;t work in another phone:<\/strong> Your SIM card is damaged. Skip to Step 11 to get a replacement from your carrier.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-step-4-test-another-sim-in-your-galaxy\">Step 4: Test Another SIM in Your Galaxy<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Borrow a working SIM card<\/strong> from someone else. Insert it into your Galaxy phone.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>If the other SIM works:<\/strong> Your original SIM is damaged. Skip to Step 11.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>If the other SIM also fails:<\/strong> Your phone has a problem. Continue to Step 5.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-step-5-reset-network-settings\">Step 5: Reset Network Settings<\/h2>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" loading=\"lazy\" decoding=\"async\" width=\"889\" height=\"440\" src=\"https:\/\/mobilemall.co\/blog\/wp-content\/uploads\/2025\/10\/Reset-Network-Settings.webp\" alt=\"Reset Network Settings\" class=\"wp-image-21286\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">This fixes corrupted network configurations. You&#8217;ll lose saved WiFi passwords and Bluetooth pairings, but SIM detection often starts working again.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Open <strong>Settings<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Tap <strong>General Management<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Tap <strong>Reset<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Tap <strong>Reset Network Settings<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Tap <strong>Reset Settings<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Tap <strong>Reset<\/strong> to confirm.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Phone will restart. Test the SIM.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Working now?<\/strong> Done. <strong>Still broken?<\/strong> Step 6.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-step-6-run-samsung-members-diagnostics\">Step 6: Run Samsung Members Diagnostics<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Open the <strong>Samsung Members<\/strong> app. Don&#8217;t have it? Download from Galaxy Store.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Tap <strong>Get Help<\/strong> at the bottom.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Tap <strong>View Tests<\/strong> under Diagnostics.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Find <strong>&#8220;SIM Card&#8221;<\/strong> test and run it.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Also run <strong>&#8220;Mobile Network&#8221;<\/strong> test.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>If tests fail:<\/strong> Your SIM reader hardware likely has issues. Skip to Step 14 for repair options.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>If tests pass but you still have the error:<\/strong> Software issue. Continue to Step 7.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-step-7-one-ui-7-specific-fix-phantom-sim-error\">Step 7: One UI 7 Specific Fix (Phantom SIM Error)<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Only do this if you&#8217;re on <strong>One UI 7<\/strong> and getting repeated &#8220;SIM not inserted&#8221; notifications but your service actually works fine.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Try the reseating fix first:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Remove SIM tray<\/strong>.<\/li>\n\n\n\n<li>Immediately <strong>slide it back in<\/strong> without changing anything.<\/li>\n\n\n\n<li>Check if notifications stop.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">If that doesn&#8217;t work, try the brightness workaround:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Open <strong>Settings \u2192 Display<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Turn <strong>OFF auto-brightness<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Drag brightness slider <strong>all the way to the bottom<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Enable <strong>Airplane Mode<\/strong>. Wait 30 seconds.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Disable <strong>Airplane Mode<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Go back to Display settings and turn auto-brightness back ON if you want.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Check if the phantom notifications stopped.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-step-8-check-for-software-updates\">Step 8: Check for Software Updates<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Settings \u2192 Software Update \u2192 Download and Install<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If an update is available, <strong>install it<\/strong>. Samsung fixes SIM bugs through patches.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">After updating, restart and test.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-step-9-esim-problems-if-using-esim\">Step 9: eSIM Problems (If Using eSIM)<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">eSIM won&#8217;t activate or shows &#8220;activating&#8221; forever?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Delete the eSIM profile:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Settings \u2192 Connections \u2192 SIM Manager<\/strong><\/li>\n\n\n\n<li>Tap your <strong>eSIM<\/strong><\/li>\n\n\n\n<li>Tap <strong>Remove<\/strong><\/li>\n\n\n\n<li>Confirm removal<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Contact your carrier for a <strong>fresh QR code<\/strong>. The old one might be corrupted.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Make sure you have <strong>WiFi or mobile data connection<\/strong> when activating. eSIM activation needs internet.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Scan the new QR code:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Settings \u2192 Connections \u2192 SIM Manager<\/strong><\/li>\n\n\n\n<li><strong>Add eSIM<\/strong><\/li>\n\n\n\n<li><strong>Scan QR code<\/strong> from carrier<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>eSIM only works when physical SIM is inserted?<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This is a known bug in <a href=\"https:\/\/mobilemall.co\/samsung-galaxy-s23\">S23<\/a>, <a href=\"https:\/\/mobilemall.co\/samsung-galaxy-s24\">S24<\/a>. Some users need their deactivated physical SIM in the tray for eSIM to function. No permanent fix yet &#8211; keep the dead physical SIM in the tray or wait for Samsung to patch it.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-step-10-dual-sim-issues\">Step 10: Dual SIM Issues<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Second SIM slot not detecting your card?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Settings \u2192 Connections \u2192 SIM Manager<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Check if <strong>SIM 2<\/strong> appears at all:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>If SIM 2 shows but is toggled off:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Toggle it <strong>ON<\/strong>.<\/li>\n\n\n\n<li><strong>Restart phone<\/strong>.<\/li>\n\n\n\n<li>Test.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>If SIM 2 doesn&#8217;t appear:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Power off phone<\/strong>.<\/li>\n\n\n\n<li><strong>Remove both SIM cards<\/strong>.<\/li>\n\n\n\n<li><strong>Swap their positions<\/strong> (SIM 1 goes to slot 2, SIM 2 goes to slot 1).<\/li>\n\n\n\n<li><strong>Power on<\/strong>.<\/li>\n\n\n\n<li>Check SIM Manager again.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-step-11-get-a-replacement-sim-from-your-carrier\">Step 11: Get a Replacement SIM from Your Carrier<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">If your SIM card tested bad in multiple phones, you need a <strong>new SIM<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Visit your carrier store<\/strong> or call support. They&#8217;ll deactivate the old SIM and issue a new one. Usually takes 10-15 minutes at a store.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Bring your account information and ID.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-step-12-check-carrier-compatibility\">Step 12: Check Carrier Compatibility<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Using an unlocked phone with a new carrier?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Check your model number: <strong>Settings \u2192 About Phone \u2192 Model Number<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>SM-G990U1<\/strong> = Unlocked U.S. model<br><strong>SM-G990U<\/strong> = Carrier locked<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Unlocked phones work with most carriers but your carrier might need to <strong>register your IMEI number<\/strong> on their network.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Call your carrier<\/strong> and give them your IMEI (<strong>Settings \u2192 About Phone \u2192 IMEI information<\/strong>). They&#8217;ll provision your line properly.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-step-13-try-safe-mode-check-for-app-interference\">Step 13: Try Safe Mode (Check for App Interference)<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Power off<\/strong> your phone.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Power on<\/strong> and immediately <strong>hold Volume Down<\/strong> when you see the Samsung logo.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Keep holding until the phone boots completely. <strong>&#8220;Safe Mode&#8221;<\/strong> will appear at the bottom left.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Test if the SIM is detected in Safe Mode.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>If SIM works in Safe Mode:<\/strong> A third-party app is causing the problem. Restart normally and uninstall recently added apps one by one until you find the culprit.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>If SIM still doesn&#8217;t work in Safe Mode:<\/strong> Not an app issue. Continue to Step 14.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">To exit Safe Mode: Just restart normally.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-step-14-hardware-test-with-diagnostic-menu\">Step 14: Hardware Test with Diagnostic Menu<\/h2>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/mobilemall.co\/blog\/wp-content\/uploads\/2025\/10\/Hardware-Test-with-Diagnostic-Menu-1024x576.webp\" alt=\"Hardware Test with Diagnostic Menu\" class=\"wp-image-21288\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Open your <strong>Phone app<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Dial: <strong><code>*#0*#<\/code><\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A diagnostic grid appears. Find the <strong>SIM Card test<\/strong> (if your model has it).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Run the test.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Test fails:<\/strong> Hardware problem confirmed. Skip to Step 15.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Test passes:<\/strong> Software corruption. Try Step 15 anyway since you&#8217;ve exhausted software fixes.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-step-15-factory-reset-last-software-attempt\">Step 15: Factory Reset (Last Software Attempt)<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>WARNING: This erases everything on your phone.<\/strong> Back up your data first.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Settings \u2192 General Management \u2192 Reset \u2192 Factory Data Reset<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Follow prompts to reset.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Phone will restart and take you through initial setup again.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Test the SIM after setup completes.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Still not working after factory reset?<\/strong> Hardware failure. Move to Step 16.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-step-16-professional-repair-required\">Step 16: Professional Repair Required<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">You&#8217;ve confirmed <strong>hardware failure<\/strong>. Your options:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>If phone is under warranty:<\/strong> Contact Samsung support. They&#8217;ll set up a repair or replacement. Takes 1-2 weeks typically.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>If out of warranty:<\/strong> Visit a phone repair shop. <strong>SIM reader replacement costs $50-150<\/strong> depending on your model.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Common hardware causes:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Damaged SIM reader flex cable<\/strong> (from drops).<\/li>\n\n\n\n<li><strong>Water corrosion<\/strong> on internal contacts.<\/li>\n\n\n\n<li><strong>Defective SIM reader component<\/strong>.<\/li>\n\n\n\n<li><strong>Logic board damage<\/strong>.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Professional diagnostics will identify exactly what failed before repair. Many repair services can test your phone and give you a quote.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-model-specific-quick-notes\">Model-Specific Quick Notes<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>S24 Ultra \/ S23 Ultra:<\/strong> Known SIM reader failures in first year. Warranty should cover.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong><a href=\"https:\/\/mobilemall.co\/samsung-galaxy-z-fold6\">Z Fold 6<\/a> \/ <a href=\"https:\/\/mobilemall.co\/samsung-galaxy-z-flip6\">Z Flip 6<\/a>:<\/strong> Make sure phone closes completely flat. Folding mechanism can stress the SIM area.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong><a href=\"https:\/\/mobilemall.co\/samsung-galaxy-s21-fe-5g\">S21 FE<\/a>:<\/strong> One UI 7 update broke network registration for many users. Model identifier changed from <strong>SM-G990U1<\/strong> to <strong>SM-G990U1\/DS<\/strong>. No fix yet except waiting for Samsung patch.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A Series phones:<\/strong> SIM readers fail more often than flagship models. Same fixes apply.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-still-stuck\">Still Stuck?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">For general phone SIM troubleshooting that applies to all brands (not just Samsung), including <strong>carrier outage checks<\/strong> and additional diagnostic techniques, see our complete guide on <strong>fixing &#8220;No SIM&#8221; or &#8220;No Service&#8221; errors<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If software fixes didn&#8217;t work and diagnostics point to <strong>hardware failure<\/strong>, professional <a href=\"https:\/\/quickrepairona.com\/\">phone repair<\/a> services can identify the exact failed component and give you a repair quote before committing to the work.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Key: Hold Volume Down + Power button together for 7 seconds minimum. Phone will restart. Check if the SIM error cleared. Your Samsung Galaxy showing &#8220;No SIM&#8221; or &#8220;SIM Not Detected&#8221; even though the card is in the tray? Follow these steps in order. Start from the top and work down until your SIM is [&hellip;]<\/p>\n","protected":false},"author":182,"featured_media":21282,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2840],"tags":[],"class_list":["post-21256","post","type-post","status-publish","format-standard","has-post-thumbnail","category-tips-tricks"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v23.7 (Yoast SEO v27.6) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Samsung Galaxy SIM Card Not Detected? Step-by-Step Fix<\/title>\n<meta name=\"description\" content=\"Hold Volume Down + Power button together for 7 seconds minimum. Phone will restart. 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