Check these first
Do not assume the cause from the symptom alone. First determine whether the issue affects the whole phone, one app, one connection, or one accessory. Work from low-impact checks toward recovery or repair.
- Confirm the phone itself can use mobile data
- Verify that the carrier plan permits tethering
- Check connected-device limits, battery level, and data allowance
Critical diagnosis for this symptom
Separate mobile service, tethering entitlement, Wi-Fi band, and client-device settings.
After changing SSID or password, remove the old saved network on the client.
Escalate with device, OS, error, and reproduction details when the issue persists after restart, controlled comparison, and update checks, or when physical damage, abnormal heat, account suspension, or carrier provisioning is suspected.
Narrow down the cause
| Scope of the issue | Where to check next |
|---|---|
| Only one app is affected | Check app permissions, updates, storage, cache, and reinstall options |
| The whole phone is affected | Check restart, system updates, free storage, and system settings |
| Other devices have the same issue | Check the network, service, charger, or accessory |
| The issue began after a drop or liquid exposure | Avoid repeated power or charging attempts and contact official support |
See the troubleshooting flow
Safe step-by-step process
Complete one step at a time and test after each change. Do not change several settings at once.
- 1Turn off Wi-Fi and verify that mobile data works directly on the phone.
- 2Toggle the hotspot off and on, then temporarily use a simple but secure network name and password.
- 3On the client device, forget the saved network, find it again, and re-enter the password.
- 4Switch compatibility or 2.4 GHz and 5 GHz settings so older client devices can detect the hotspot.
- 5Review Low Power mode, data limits, auto-off, VPN, and the selected data SIM, then restart both devices.
- 6If several client devices fail, ask the carrier about tethering entitlement, APN settings, throttling, and outages.
Actions to avoid
- Running an open hotspot without a password
- Leaving the hotspot active in public when it is not needed
- Using large amounts of data without checking plan limits
Prevent the issue from returning
- Use a strong password and turn the hotspot off when finished
- Test the exact client device and plan before travel or critical use
Frequently asked questions
What if my screen looks different?
Menu names and locations vary by OS, manufacturer, model, region, and software version. Use the Settings search field and check the manufacturer guide for your exact model.
When should I stop troubleshooting?
Stop as soon as the issue is fixed. Change one setting at a time so you can identify what solved the problem and reverse it if necessary.
What should I do if the issue remains?
Record how to reproduce it, verify your backup, and contact the manufacturer, carrier, or app provider most closely related to the problem.