Why can’t I receive calls on my Galaxy A55? (Causes + Solutions)

If your Galaxy A55 can’t receive calls, the most common culprits are call barring being accidentally enabled, Airplane Mode toggled on, a network mode mismatch (5G vs. LTE), or a software glitch introduced by a recent One UI update. This guide walks through every fix — from the 30-second checks to the more advanced resets — in order of how likely each one is to solve your problem.

Common Causes at a Glance

Cause	How to Identify	Quick Fix
Airplane Mode on	Airplane icon in status bar	Pull down notification shade → toggle off
Call Barring enabled	Incoming calls go straight to voicemail	Phone app → Settings → Supplementary Services → Call Barring
Call Forwarding active	Calls ring on a different number	Phone app → Settings → Supplementary Services → Call Forwarding
VoLTE misconfiguration	Calls drop or don’t connect on 4G/5G	Settings → Connections → Mobile Networks → toggle VoLTE
Wrong network mode	No signal or weak signal	Settings → Connections → Mobile Networks → Network Mode → set to Auto
Do Not Disturb active	Screen stays silent for all notifications	Notification shade → Do Not Disturb toggle
SIM card dislodged	“No SIM” or “Emergency calls only” message	Re-seat SIM card
Phone app cache corrupt	Phone rings but you can’t answer	Settings → Apps → Phone → Storage → Clear Cache
Software bug (One UI)	Issue appeared after a system update	Update to latest One UI or reset network settings
Carrier account issue	All calls fail regardless of steps above	Call carrier from another phone

Fix 1: Disable Airplane Mode

Airplane Mode cuts all cellular and Wi-Fi connections. It’s easy to accidentally enable it from the quick settings panel.

Swipe down twice from the top of your screen to open the full Quick Settings panel.
Look for the airplane icon. If it’s highlighted (blue or white depending on your theme), tap it to turn it off.
Wait 15–20 seconds for your Galaxy A55 to reconnect to the mobile network. The signal bars should reappear in the status bar.

If you don’t see the airplane icon in Quick Settings, go to Settings → Connections → Airplane Mode and make sure it’s toggled off.

Fix 2: Restart Your Phone

A full restart clears temporary system states and forces your phone to re-register with the carrier’s network — which fixes the majority of random call reception failures.

Press and hold the Side button (power button) for about 2 seconds.
Tap Restart (not Power off).
Once your phone boots back up, wait about 30 seconds for the network to reconnect, then test with a call.

If the Side button opens Bixby instead, use Side button + Volume Down simultaneously to access the power menu.

Fix 3: Check Call Barring Settings

Call barring is one of the most overlooked causes of this problem. If it was accidentally enabled, all incoming calls will be silently blocked or sent straight to voicemail without your phone ever ringing.

Open the Phone app.
Tap the three-dot menu (⋮) in the top-right corner.
Go to Settings → Supplementary Services → Call Barring.
Tap Voice Call.
Make sure all barring types are turned off — particularly “All incoming calls” and “Incoming calls when abroad.”
If you need to disable barring, you’ll be prompted for a barring password. The carrier default is 0000 (or 1234 on some networks). Contact your carrier if neither works.

Fix 4: Check Call Forwarding

If call forwarding is active, incoming calls get redirected to another number instead of ringing your Galaxy A55. This can be set accidentally through the supplementary services menu or by a carrier-side setting.

Open the Phone app → tap ⋮ → Settings → Supplementary Services → Call Forwarding.
Tap Voice Call.
Check each forwarding type: Always forward, Forward when busy, Forward when unanswered, and Forward when unreachable.
If any are enabled, tap the option and select Turn Off or Disable.

After disabling, test by calling your number from another phone.

Fix 5: Turn Off Do Not Disturb

Do Not Disturb (DND) silences all calls and notifications. In One UI 7, it’s easy to activate accidentally when adjusting the volume or swiping through Quick Settings.

Swipe down twice to open full Quick Settings.
Look for the Do Not Disturb icon (a circle with a line through it). If it’s highlighted, tap it to disable.
Alternatively, go to Settings → Notifications → Do Not Disturb and toggle it off.

If you want to keep DND active but still receive calls from specific contacts, tap Exceptions within the DND settings and add important contacts as allowed callers.

Fix 6: Switch Network Mode (5G to LTE)

The Galaxy A55 supports 5G, LTE (4G), 3G, and 2G. In some areas — especially indoors or in rural zones — 5G signals are weak, and the phone doesn’t always gracefully fall back to LTE. This can leave you with a data connection but no ability to receive calls. Forcing the phone to LTE often resolves this immediately.

Go to Settings → Connections → Mobile Networks.
Tap Network Mode.
If currently set to 5G/LTE/3G/2G (Auto), switch to LTE/3G/2G (Auto) to force 4G LTE.
Restart your phone, then test incoming calls.

If call quality and reception improve on LTE, you’ve confirmed a 5G signal issue in your area. You can switch back to 5G when you’re in a better-covered location.

Fix 7: Toggle VoLTE (Voice over LTE)

VoLTE lets your Galaxy A55 make HD voice calls over the 4G LTE network. If VoLTE is misconfigured — or your carrier’s VoLTE service is having issues — it can prevent incoming calls from connecting. This is a known issue with some Galaxy A55 units, particularly after switching carriers or updating to a new One UI version.

Go to Settings → Connections → Mobile Networks.
Look for VoLTE Calls (may also appear as HD Voice or Enhanced LTE Services).
If it’s on, toggle it off, restart your phone, and test.
If it’s off, toggle it on, restart, and test.

Some carriers hide the VoLTE toggle and manage it automatically at the network level. If you don’t see this option, contact your carrier to confirm VoLTE is properly provisioned on your SIM.

Fix 8: Re-Seat the SIM Card

A slightly dislodged SIM card can cause intermittent call failures even when the phone shows signal bars. This is especially common after dropping the phone or carrying it in a tight pocket.

What you need: The SIM tray ejection tool that came with your Galaxy A55 (a small metal pin). A straightened paper clip also works.

Power off your Galaxy A55 completely.
Locate the SIM tray on the top edge of the phone.
Insert the ejection tool into the small pinhole next to the tray and press firmly until the tray pops out.
Remove the SIM card and inspect it — look for dirt on the gold contacts, scratches, or any physical bending.
Gently clean the gold contacts with a dry cotton swab.
Reinsert the SIM card with gold contacts facing down and the notched corner aligned with the tray cutout.
Slide the tray firmly back in until it clicks.
Power on and wait for the network to register.

If you have access to a spare SIM from your carrier, test with the alternate card to rule out a physically damaged SIM.

Fix 9: Reset Mobile Network Settings

Corrupted mobile network settings — which can happen after a One UI update — prevent the phone from properly registering with your carrier for voice calls. A network reset forces a clean reconnection.

Warning: This will delete all saved Wi-Fi passwords and Bluetooth pairings. Note your Wi-Fi passwords before continuing.

Go to Settings → General Management.
Tap Reset.
Select Reset Mobile Network Settings.
Read the warning and tap Reset Settings.
Restart your phone.
Go to Settings → Connections → Mobile Networks → Network Operators and tap Select Automatically.

Fix 10: Install the Latest One UI Update

As of 2026, the Galaxy A55 runs One UI 7 (Android 15), with One UI 8.5 beta rolling out in select markets. Early One UI 6.x builds contained known call reception bugs that were patched in subsequent releases. Staying current is essential for carrier compatibility.

Go to Settings → Software Update.
Tap Download and Install.
If an update is available, follow the on-screen steps.
After updating, restart and test incoming calls.

Fix 11: Clear the Phone App Cache

If your Samsung Phone app’s cache is corrupted, the phone may ring but you’ll find you can’t slide to answer, or calls may connect silently and immediately drop.

Go to Settings → Apps.
Tap the three-dot menu → Show system apps if the Phone app doesn’t appear in the list.
Find and tap Phone.
Go to Storage → Clear Cache.
If clearing cache doesn’t help, tap Clear Data (this resets call logs and app settings).
Restart your phone and test.

Fix 12: Test in Safe Mode

Third-party apps — particularly call managers, spam blockers, battery optimizers, and VPN apps — can intercept and block incoming calls. Safe Mode disables all downloaded apps so you can test whether a third-party app is the root cause.

Press and hold the Side button until the power menu appears.
Press and hold the Power Off icon on screen until the “Safe Mode” prompt appears.
Tap Safe Mode to confirm. Your phone restarts with “Safe Mode” in the bottom-left corner.
Test incoming calls in Safe Mode.

If calls work normally in Safe Mode, a third-party app is interfering. Reboot normally and uninstall recently added apps one at a time — prioritize call-related apps, VPNs, and battery optimization tools.

Fix 13: Contact Your Carrier

If none of the above steps work, the problem may be on the carrier’s end. Common carrier-side issues include a suspended account, a deprovisioned SIM, carrier-applied call restrictions, or a localized network outage.

Call your carrier from a different phone and ask them to confirm your account is active, no restrictions are applied to your number, and your SIM is properly provisioned. Major US carrier support numbers:

T-Mobile: 1-877-746-0909
Verizon: 1-800-922-0204
AT&T: 1-800-331-0500
Cricket: 1-800-274-2538

Fix 14: Perform a Factory Reset (Last Resort)

If every fix above has failed, a factory reset is the final software-level solution. It wipes the phone completely and eliminates any deeply embedded software conflicts.

Back up your data first. Go to Settings → Accounts and Backup → Back Up Data to save contacts, photos, and app data to Samsung Cloud or Google Drive.

Go to Settings → General Management → Reset.
Tap Factory Data Reset.
Review the list of accounts that will be removed.
Tap Reset and enter your PIN or password when prompted.
Tap Delete All to confirm.

After the reset, set up your phone fresh — do not restore from backup initially — and test calls before adding any apps back. If calls work on a clean setup, the issue was software-related and you can safely restore your backup.

When to Contact Samsung Support

If calls still don’t work after a factory reset, the issue is likely hardware — a faulty cellular modem, damaged SIM slot, or antenna damage from a drop. Contact Samsung for warranty service:

Samsung Support website: samsung.com/us/support
Samsung Support phone: 1-800-SAMSUNG (1-800-726-7864)
Walk-in service: Use the Samsung Members app → Support tab to find an authorized service center near you

The Galaxy A55 comes with a 1-year limited manufacturer’s warranty in the US. If the phone is within the warranty period and the problem is hardware-related (not physical damage or liquid damage), Samsung should cover the repair or replacement.

Bottom Line

The most common reason a Galaxy A55 can’t receive calls in 2026 is call barring or call forwarding being accidentally enabled, a VoLTE configuration issue, or a network mode mismatch between 5G and LTE. Start with fixes 1–5 (Airplane Mode, restart, call barring, call forwarding, Do Not Disturb) — these resolve the issue for the vast majority of users in under five minutes. If those don’t work, move to the network mode switch and VoLTE toggle. A factory reset is rarely needed but is highly effective when the software is genuinely corrupted. If the phone is still under warranty and hardware is suspected, Samsung’s repair service is the right next step.