Seeing “No Service” or “No Signal” on your phone is frustrating, especially when you need to make a call or use data. The good news is that most No Service errors are caused by simple fixable problems. This guide walks you through nine proven fixes to restore service on any Android or iPhone.
Why Does My Phone Say No Service?
Your phone shows No Service when it cannot connect to your carrier’s network. This can happen due to a weak signal in your area, a software glitch, an incorrectly inserted SIM card, an expired plan, or a carrier outage. Here are the most effective fixes to try.
Fix 1: Toggle Airplane Mode On and Off
This is the quickest fix for a temporary No Service error. Turning Airplane Mode on forces your phone to disconnect from all networks. Turning it back off forces it to reconnect from scratch, which often resolves software-related signal issues.
On iPhone: Swipe down from the top right to open Control Center and tap the Airplane icon. On Android: Pull down the notification shade and tap Airplane Mode. Wait 30 seconds, then tap it again to turn off.
Fix 2: Restart Your Phone
A full restart clears temporary software issues that can prevent your phone from connecting to the network. Power your phone completely off, wait 10–15 seconds, then power it back on. Many No Service issues resolve on their own after a restart.
Fix 3: Check Your SIM Card
A loose, dirty, or damaged SIM card can cause a No Service error. Power off your phone, remove the SIM card using the ejector tool (or a straightened paperclip), inspect it for damage, gently wipe the gold contacts with a dry cloth, reinsert it firmly, and power your phone back on.
Fix 4: Check for a Carrier Outage
Your carrier may be experiencing a network outage in your area. Visit your carrier’s website, their official Twitter/X account, or a site like Downdetector.com to check for reported outages. If there is an outage, you will need to wait for the carrier to restore service.
Fix 5: Update Carrier Settings
Carriers periodically push network updates to improve connectivity. On iPhone: Go to Settings > General > About. If an update is available, you will be prompted to install it. On Android: Go to Settings > About Phone > Software Update and check for updates, or contact your carrier for their update process.
Fix 6: Reset Network Settings
Resetting network settings clears all Wi-Fi passwords, Bluetooth pairings, and cellular settings — and often fixes persistent No Service errors caused by incorrect network configurations.
On iPhone: Settings > General > Transfer or Reset iPhone > Reset > Reset Network Settings. On Android (Samsung): Settings > General Management > Reset > Reset Network Settings.
Fix 7: Manually Select Your Network
Sometimes your phone gets stuck trying to connect to a network it cannot reach. Manually selecting your carrier can force a new connection.
On Android: Go to Settings > Connections > Mobile Networks > Network Operators > Search Networks. Select your carrier from the list. On iPhone: Go to Settings > Cellular > Network Selection, turn off Automatic, and choose your carrier manually.
Fix 8: Check Your Account Status
If your account has an unpaid balance or your prepaid plan has expired, your carrier will cut off service and your phone will show No Service. Log in to your carrier’s app or website, or call customer service, to confirm your account is active and in good standing.
Fix 9: Contact Your Carrier
If none of the above fixes work, the issue may be on the carrier’s end — such as your SIM card being deactivated, your account being flagged, or a tower issue specific to your area. Contact customer service directly and explain that you are seeing No Service. They can diagnose the issue from their end and often resolve it without you needing to do anything else.
No Service After Switching Carriers?
If you switched to a new carrier and your phone immediately shows No Service, the most common causes are an incompatible or not yet activated SIM card, a phone that is still locked to the previous carrier, or incorrect APN settings. Check that your phone is unlocked, activate the new SIM properly, and enter the correct APN settings for your new carrier.
Frequently Asked Questions
Why does my phone say No Service but has Wi-Fi?
Your phone can connect to Wi-Fi even without cellular service because they use different technologies. If you have Wi-Fi but no cellular service, the issue is specifically with your SIM card connection, your carrier account, or the cellular network in your area.
Why does my phone show No Service in my house but works outside?
Your carrier may have weak indoor coverage at your location. Building materials like concrete, metal, and low-E glass can block cellular signals. Consider a signal booster designed for home use, or enable Wi-Fi calling on your phone so calls and texts route over your Wi-Fi connection instead of the cellular network.
Will a factory reset fix No Service?
A factory reset should be a last resort since it erases all your data. Try all the fixes above first, especially Reset Network Settings, before doing a full factory reset. If you do factory reset, back up your phone first.