Samsung Galaxy says No SIM card: fixes

By Saadat Rafiq · 2 min read · 6 steps · Published 6 October 2026

Device

Android

Shown on

Samsung Galaxy A57 5G (SM-A576B), One UI 8.5, Android 16

App

Settings

Real screenshots

4 of 6 steps

Checked

October 2026

Sources

2 official, linked below

Step by step

1. 

   Check the status bar

   Pull down the quick panel. With a working SIM, the signal bars and the carrier name show at the top. We blurred our carrier.

   Done

2. 

   Switch Airplane mode on and off

   Tap the plane button in the quick panel, wait a few seconds and tap it again. The phone searches for the SIM and network again.

   Done

3. 

   Restart the phone

   Tap the power icon at the top of the quick panel, then Restart.

   Done

4. 

   Check SIM manager

   Open Settings, Connections, SIM manager. Each SIM has its own switch; if it is off, the phone ignores that SIM. Ours shows SIM 1 on and an empty second slot that says No SIM card. We blurred the number.

   Done

5. Take the SIM out and check it

   Turn the phone off, open the tray with the ejector pin, wipe the SIM and tray with a dry cloth and put the SIM back with the gold contacts facing up. A tray that is not fully closed also causes the message.

   Done

6. Try the SIM in another phone

   If the SIM fails in another phone too, ask your carrier for a new SIM or an eSIM. If another SIM works in your phone, the old SIM is the problem.

   Done

About this guide

No SIM card means the phone cannot read the SIM at all, which is different from No service (SIM read, but no network). The fix is usually in the tray or the SIM manager, not in the network settings. We only looked at these screens on our phone and changed nothing.

The screenshots are from a Samsung Galaxy A57 5G with One UI 8.5 and Android 16, in Dark mode. Other Galaxy phones on One UI 8 use the same menus; on older One UI versions a few names and positions differ.

Good to know

If the phone still restarts into No SIM card, Samsung suggests Settings, General management, Reset, Reset mobile network settings; it also removes saved Wi-Fi networks and Bluetooth pairings.

If the phone reads the SIM but has no signal, see Samsung Galaxy says No service. Moving to an eSIM avoids a worn tray: how to add an eSIM on a Samsung Galaxy.

In short: Airplane mode on and off, restart, SIM switched on in SIM manager, reseat the SIM, try it in another phone.