Mobile Data Not Working
Can’t connect to the internet via mobile data? This troubleshooting guide covers the most common cellular data problems—like “No Internet,” slow speeds, or data not working after SIM swap—and provides step-by-step solutions for Android and iPhone. Get your data working fast on any carrier.
Common Symptoms
No internet access on cellular network
“No data connection” or “No service”
Slow or intermittent data speeds
Mobile data not working after switching SIMs or carriers
Step by Step Troubleshooting
Android
Toggle Mobile Data Off and On
Quick Settings > Mobile Data > Turn off, then on again.Check Signal Strength
Move to an area with better coverage.Airplane Mode
Ensure Airplane Mode is OFF.Check APN Settings
Settings > Network & Internet > Mobile Network > Access Point Names. Verify with carrier info.Restart Device
Try SIM in Another Device
Helps isolate SIM or device issue.Check for Software Updates
Settings > System > Updates.Contact Carrier if unresolved.
iPhone
Toggle Cellular Data Off and On
Settings > Cellular > Cellular Data > Turn off, then on again.Check Signal Strength
Move to an area with better coverage.Airplane Mode
Ensure Airplane Mode is OFF.Check Cellular Data Settings
Settings > Cellular > Cellular Data Options > Cellular Data Network. Verify APN with carrier.Restart iPhone
Try SIM in Another iPhone
Helps isolate SIM or device issue.Check for iOS Updates
Settings > General > Software Update.Contact Carrier if unresolved.
Troubleshooting Flowchart (Text Outline)
Mobile/cellular data toggled off/on?
No → Toggle now
Yes ↓Signal present?
No → Move to area with coverage
Yes ↓Airplane Mode OFF?
No → Turn OFF
Yes ↓APN settings correct?
No → Update to carrier’s APN
Yes ↓Restart device
Try SIM in another device
Works → Device issue
Doesn’t work → SIM/carrier issueSoftware up to date?
No → Update software
Yes ↓Still not working?
Yes → Contact carrier
Pro Tips / Dealer Notes
Incorrect APN settings are a leading cause of data issues after switching carriers or SIMs.
Carrier data outages may affect entire regions—check with your provider if widespread.
Some prepaid plans may restrict data speeds or usage.
FAQs
Q: Why does my phone say “No data connection” but I have bars?
A: APN settings may be wrong, or your account may be suspended—verify both with your carrier.
Q: Why is my mobile data slow?
A: Causes include weak signal, network congestion, or plan limitations—try moving to a different location or checking your plan details.
