Symptoms
- Signal bars are full but apps won't load anything
- Data works over Wi-Fi but not cellular
- Data icon (4G/5G/LTE) is missing even with signal
- Data stopped working after a SIM swap or new phone
Likely causes
- CommonMobile data toggled off in phone settingsThis simple setting is easy to overlook after an update or accidental tap.
- CommonIncorrect or missing APN (Access Point Name) settingsAPN settings tell the phone how to connect to the carrier's data network and can reset after a SIM change.
- CommonData plan exhausted or throttledHitting a monthly data cap can slow or cut off data entirely depending on your plan.
- PossibleAccount restriction or unpaid balance limiting data specificallySome billing issues restrict data while leaving calls/texts active.
- Less commonNetwork-side data outage despite normal voice serviceData and voice can be affected independently during certain outages.
What to do
- Confirm mobile data is turned on in your phone's cellular settings.
- Check your data usage and plan to see if you've hit a cap or throttling threshold.
- Look up or reset your carrier's correct APN settings, which are often available on the carrier's support site.
- Restart the phone to refresh its data connection.
- Toggle airplane mode on and off to force the phone to reconnect to the network.
- Contact your carrier to confirm your account and data plan are in good standing.
When to call a pro
If data still doesn't work after confirming APN settings and account status, contact your carrier's technical support for a network-side check.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.