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Android mobile data not working? Fix 4G and 5G connection

Your phone may show signal bars even when web pages do not load. These simple checks help distinguish a mobile network problem from a Wi-Fi or app issue.

Phones6 min readPublished

Turn off Wi-Fi briefly, verify mobile data is enabled and test signal before contacting your carrier.

Editorial illustration for android · mobile internet troubleshooting
Illustration for context; not a screenshot of your device or settings.

Before you start

  • Check whether other people on the same network have mobile service.
  • Know whether your mobile plan includes active data and the device has an enabled SIM or eSIM.
  • Do not delete an eSIM, change APN values randomly or factory-reset your phone as a first step.
Android data troubleshooting flowchart showing Wi-Fi isolation, mobile data, airplane mode, signal check and carrier help.
Tap to enlarge. The flowchart is a simplified illustration; use the detailed steps below.

Try these checks in order

01

Test mobile data without Wi-Fi

Turn Wi-Fi off temporarily and open a trusted website in your browser. This verifies that cellular data, rather than your home internet connection, is being tested.

02

Check Mobile data settings

Open Settings → Network & internet (or Connections) → SIMs / Mobile network and confirm Mobile data is enabled for the correct SIM. Names vary by phone. If you have two SIMs, check the selected data SIM.

03

Toggle airplane mode, then restart

Enable Airplane mode for about 10 seconds and turn it off. Allow the phone to reconnect. If there is no change, perform a normal restart and test again.

04

Look at coverage and your account

Check for 4G, LTE or 5G next to the signal indicator. Move to an area with better reception if safe. Verify that data has not been paused, limited or used up in your carrier plan.

05

Ask the carrier before advanced resets

If calls or mobile data fail in several locations or your SIM is not recognized, contact your network operator. Ask about outages, activation and account restrictions. Only consider network resets after learning what saved Wi-Fi/Bluetooth settings may be lost.

Safety first: Avoid resetting or deleting data unless clearly needed. Do not open electrical equipment, TVs, batteries or power supplies. Stop if there is physical damage, swelling, overheating or a burning smell.

Frequently asked questions

Why does Wi-Fi work but mobile data not work?

That points toward cellular signal, plan, mobile data settings or a carrier outage rather than your home Wi-Fi.

Will airplane mode delete my photos?

No. A short airplane-mode toggle turns radios off and on; it does not erase stored photos or apps.

Should I delete my eSIM to reconnect?

No. Deleting an eSIM can require carrier reactivation. Contact your carrier before making eSIM changes.

Manufacturer documentation

This original, independent guide draws on official documentation; menus and capabilities may differ by model, region and software version. It does not replace professional service.

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