Hi When your Samsung Note 20 isn’t connecting to the mobile network, the issue can be caused by SIM, network settings, or software problems. Let’s narrow it down:
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🧩 Step 1: Basic checks
1. Check Airplane Mode
Go to Quick Settings → Make sure Airplane mode is OFF.
2. Restart your phone
A simple restart can often restore network connection.
3. Try another SIM card
Insert your SIM into another phone.
If it works there → problem is with your Note 20.
If it doesn’t → the issue is with your SIM or network provider.
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📶 Step 2: Check Network Settings
1. Go to Settings → Connections → Mobile networks
2. Make sure:
Network mode is set to LTE/3G/2G (auto connect)
Data roaming is off (unless you’re outside your home network area)
3. Tap Network operators → Search networks manually
See if your carrier appears and try connecting manually.
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🔄 Step 3: Reset Network Settings
If still no luck:
1. Go to Settings → General management → Reset → Reset network settings
2. Confirm and restart your phone.
(This won’t delete data, just Wi-Fi, Bluetooth, and network settings.)
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⚙️ Step 4: Software & SIM Tray
Make sure your phone is updated (Settings → Software update).
Remove the SIM card, clean it gently, and reinsert it properly.
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🧰 Step 5: Safe Mode test
To check if a third-party app is causing it:
1. Press and hold Power button → Tap and hold “Power off” → Select “Safe mode”
2. See if mobile network works in Safe Mode.
If yes → an app you installed is interfering.
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🏢 Step 6: If still not working
If none of the above helps:
Dial *#06# — see if your phone shows an IMEI number.
If “Null” or “Invalid”, your IMEI may be corrupted, and the phone needs service.
You can also visit a Samsung Service Centre or your network provider to check SIM provisioning.
