LG G5 Loses Service: Fixes That Actually Work
If your LG G5 keeps losing service or shows “No Signal,� the fix is usually a SIM card reseat, a network settings reset, or a hardware repair for a known antenna issue. This guide walks through the most common causes and the step-by-step solutions that restore cellular reception on this 2016 flagship.
Why the LG G5 Drops Service
The LG G5 uses a modular design where the bottom chin contains the antenna contacts. Over time, these contacts can bend, oxidize, or lose pressure against the main board, causing intermittent or permanent signal loss. Software glitches after updates, corrupted network settings, or a damaged SIM card are also frequent culprits. Unlike many phones, the G5’s antenna design makes physical contact issues a primary suspect before blaming the carrier.
Quick Fixes to Try First
Start with the simplest solutions—they resolve a surprising number of cases without any tools or costs.
- Toggle Airplane Mode: Swipe down and tap the airplane icon, wait 10 seconds, then turn it off. This forces the phone to re-register with the tower.
- Restart the phone: A full power cycle clears temporary radio stack errors.
- Check for carrier outages: Look up your provider’s status page or call a friend on the same network to see if they also have no signal.
- Remove and reinsert the SIM: Power off, eject the tray, clean the gold contacts with a dry cloth, and reseat firmly.
- Try the SIM in another phone: If it works there, the problem is your G5; if not, the SIM or account is at fault.
Reset Network Settings
If quick fixes fail, corrupted network data is the next likely cause. This does not erase personal files, only Wi-Fi passwords, Bluetooth pairings, and cellular settings.
- Go to Settings → General → Backup & reset.
- Tap Network settings reset.
- Confirm and wait for the phone to restart.
- Re-enter your Wi-Fi password and re-pair Bluetooth devices.
After the reset, check if the signal bars return. If they do, the issue was a misconfigured APN or a stuck network mode.
Manual Network Selection
Sometimes the G5 fails to automatically latch onto the correct network, especially after traveling or when the carrier updates its bands. Force it to search manually:
- Open Settings → Network → Mobile networks.
- Tap Network operators.
- Turn off Select automatically.
- Wait for the list, then tap your carrier’s name.
If it says “Can’t connect,� try each available network one at a time. If none work, the radio hardware is likely the problem.
The Antenna Contact Fix
This is the most common hardware fix for the G5. The bottom chin’s two gold pins press against the motherboard; when they lose tension, signal drops. You can restore contact without replacing parts.
- Power off the phone and remove the bottom chin by pressing the release button.
- Look at the two metal pins on the chin’s inner edge.
- Use a plastic spudger or a toothpick to gently lift each pin about 1–2 mm higher. Be careful not to break them.
- Reattach the chin and power on.
If the pins are broken or severely corroded, you can buy a replacement chin assembly online for a few dollars. This is a user-serviceable part—no soldering required.
SIM Card and Tray Issues
A damaged or improperly seated SIM is often mistaken for a hardware failure. Check these details:
- SIM size: The G5 uses a nano-SIM. If you cut a larger SIM, it may not make full contact.
- Tray damage: A bent tray can push the SIM away from the contacts.
- Dirt in the slot: Blow out any debris with compressed air.
- SIM lock: If the phone is carrier-locked and you inserted a different carrier’s SIM, it will show no service.
When to Consider Hardware Repair
If you’ve tried all software fixes and the antenna pin lift, the issue may be deeper—like a loose connector on the main board or a failing radio chip. In that case:
- Open the back cover (it’s removable) and check that the antenna cables are firmly attached to the board.
- If you’re not comfortable, take it to a phone repair shop. The cost is usually low because the G5 parts are widely available.
- Before spending money, test the phone in a different location to rule out a weak tower area.
Frequently Asked Questions
Why does my LG G5 lose service after an update?
Software updates can reset network settings or introduce a bug in the radio stack. Performing a network settings reset and then manually selecting your carrier usually fixes it. If not, a factory reset (back up first) often clears the issue.
Can a broken antenna pin really cause no signal?
Yes. The G5’s antenna relies on those two pins making solid contact with the motherboard. If they’re flattened or corroded, the phone cannot receive any signal, even though it powers on fine.
Is there a way to test if the SIM is bad?
Put the SIM in another unlocked phone. If that phone shows signal, the SIM is fine. If it also shows no service, contact your carrier for a replacement SIM.
Will a factory reset fix the LG G5 no service problem?
It can, if the cause is software corruption. Back up your data first. After the reset, set up as new (don’t restore from backup) and test the signal before reinstalling apps.
Does the LG G5 support all carriers?
No. The G5 has different model numbers for different regions (e.g., H850 for Europe, LS992 for Sprint). If you use a carrier whose bands aren’t supported by your model, you may get no service or only 2G/3G in some areas.
My G5 shows signal but can’t make calls—what’s wrong?
That’s often a separate issue: either the dialer app is crashing, or the phone is stuck on a network mode that doesn’t support voice (like LTE-only). Go to Mobile networks → Network mode and select “LTE/GSM/WCDMA� (auto).
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