Your phone shows full bars, 4G, LTE, or 5G, but websites will not load and apps say there is no internet connection. This can happen even when your signal looks strong because signal bars only show your connection to the cellular network—they do not guarantee that mobile internet is working correctly.
In most cases, mobile data not working despite full signal can be fixed by reconnecting to the network, checking the correct SIM and data settings, resetting the APN, or refreshing your phone's mobile network settings.
If the internet works normally but individual Android apps keep closing or freezing, the issue may be with the app rather than your connection. See our guide on how to fix Android apps that keep crashing.
Start with the quick fixes below before resetting anything.
Quick Answer
If your phone has full signal but no internet, first turn Wi-Fi off and confirm Mobile Data is enabled. Then toggle Airplane Mode on for about 15–30 seconds, turn it off, and restart your phone. If mobile data still does not work, check your data plan, SIM selection, roaming settings, APN, VPN, and mobile network settings.
Why Do I Have Full Signal but No Internet?
Seeing full signal bars does not always mean your phone has a working internet connection. Your phone may be connected to a nearby cellular tower while the mobile data connection itself is unavailable or incorrectly configured.
Common causes include:
- A temporary carrier network problem or outage
- Mobile data being disabled
- The wrong SIM being selected for mobile data
- An expired or exhausted data plan
- Incorrect APN settings
- A SIM or eSIM provisioning problem
- Data roaming being disabled while traveling
- A VPN or custom DNS interfering with the connection
- Incorrect or corrupted mobile network settings
- Temporary 5G, LTE, or carrier network problems
The following fixes are ordered from the easiest and safest to the more advanced options.
1. Turn Mobile Data Off and Back On
Start by forcing your phone to reconnect its mobile data session.
On Android
- Swipe down from the top of the screen to open Quick Settings.
- Find Mobile Data or Internet.
- Turn mobile data off.
- Wait about 10 seconds.
- Turn it back on.
On many Samsung phones, you can also go to Settings > Connections > Data usage > Mobile data.
On iPhone
- Open Settings.
- Tap Cellular or Mobile Data.
- Turn Cellular Data off.
- Wait about 10 seconds.
- Turn it back on.
Now turn Wi-Fi off temporarily and try opening a website using only mobile data.
2. Toggle Airplane Mode
Airplane Mode temporarily disconnects your phone from cellular networks. Turning it back off forces the device to establish a fresh connection with your carrier.
- Turn Airplane Mode on.
- Wait about 15–30 seconds.
- Turn Airplane Mode off.
- Wait for 4G, LTE, or 5G to appear again.
- Test your internet connection.
This is especially useful when your phone shows full bars but mobile data suddenly stops working after moving between locations.
3. Restart Your Phone
If reconnecting to the network does not help, restart the phone completely.
A restart reloads your phone's network services and can clear temporary connection problems without deleting any data.
After the phone turns back on:
- Leave Wi-Fi turned off.
- Make sure Mobile Data is enabled.
- Wait for the cellular network indicator to appear.
- Try loading a website.
4. Make Sure the Correct SIM Is Used for Mobile Data
This is an important check if your phone has two physical SIM cards, two eSIMs, or a combination of both.
Your phone may have excellent signal on one SIM while mobile data is assigned to the other line.
On Android
Look for a setting such as:
Settings > Network & internet > SIMs
or, on many Samsung devices:
Settings > Connections > SIM manager
Make sure the SIM with an active data plan is selected for Mobile data.
On iPhone
- Open Settings.
- Tap Cellular.
- Tap Cellular Data.
- Select the line that has your mobile data plan.
If you recently added an eSIM, traveled internationally, or changed carriers, checking the active data line is particularly important.
5. Check Your Data Plan and Carrier
Strong cellular signal cannot bypass a carrier-side problem.
Check whether:
- Your mobile account is active
- Your bill or prepaid balance is up to date
- You have remaining mobile data
- Your carrier is experiencing an outage
- Your SIM or eSIM is properly activated
- Your phone is allowed to use mobile data on your plan
If possible, check your carrier's app or website while connected to Wi-Fi.
Another useful test is to move to a different location. If mobile data suddenly starts working elsewhere, the problem may be with a particular tower or local network congestion rather than your phone.
6. Check Data Limits and App Restrictions
If some apps work on mobile data but others do not, check whether cellular access has been restricted for those apps.
On iPhone
- Open Settings > Cellular.
- Scroll down to the list of apps.
- Make sure cellular access is enabled for the affected app.
On Android
The exact menu varies by manufacturer, but open the affected app's settings and look for options such as Mobile data, Background data, Data usage, or Unrestricted data usage.
Also check whether you have configured a mobile data warning or limit that may be stopping data after a certain amount of usage.
If the problem is mainly with WhatsApp alerts rather than the whole internet connection, follow our separate guide to fix WhatsApp notifications not working on Android or iPhone.
7. Check Data Roaming When Traveling
If mobile data stopped working after entering another country or leaving your carrier's normal coverage area, check Data Roaming.
Warning: Enabling data roaming can result in additional carrier charges. Make sure your plan includes roaming before turning it on.
On iPhone
Go to Settings > Cellular > Cellular Data Options and check Data Roaming.
If you use Dual SIM, first select the appropriate cellular line.
On Android
Open your mobile network or SIM settings and look for Roaming or Data roaming. The exact location depends on your phone manufacturer.
If you are not traveling, you usually do not need to change this setting.
8. Change the Preferred Mobile Network
Sometimes your phone may display 5G while the actual data connection is unstable.
If your phone allows you to choose a preferred network type, temporarily switching from 5G to LTE or 4G can help determine whether the problem is specific to the 5G connection in your area.
Look in your SIM or mobile network settings for options such as:
- Preferred network type
- Network mode
- Voice & data
Select an automatic option when available. If you are currently using 5G and have no internet, test LTE or 4G temporarily.
If LTE works normally but 5G does not, you can return to automatic mode later and check again when you are in another location.
9. Reset the APN Settings
The Access Point Name (APN) tells your phone how to connect to your carrier's mobile data network. Incorrect APN settings can leave you with cellular signal but no working internet connection.
This is especially worth checking if:
- You recently changed carriers
- You inserted a new SIM
- You moved your SIM from another phone
- You manually changed network settings
- Mobile data stopped working after changing an APN
On Samsung Galaxy
A common path is:
Settings > Connections > Mobile networks > Access Point Names
Use the menu to reset the APN to its default settings if that option is available.
On iPhone
APN controls are only visible when your carrier allows you to change them. If available, look under Settings > Cellular > Cellular Data Network.
Important: Do not enter random APN values from websites. Incorrect APN information can stop cellular data from working. If the APN needs to be entered manually, get the correct values directly from your mobile carrier.
10. Temporarily Disable VPN or Private DNS
A VPN, security app, ad blocker, firewall, or custom DNS configuration can sometimes make it look like mobile data has stopped working even though your cellular connection itself is active.
Temporarily disable:
- VPN apps
- Custom Private DNS
- Network-level ad blockers
- Firewall or security apps that filter internet traffic
Then test mobile data again.
If your connection immediately starts working, re-enable your services one at a time to identify which one is causing the problem.
Network changes, VPNs, and switching between Wi-Fi and mobile data can also cause problems with some apps. For example, if Discord repeatedly asks you to verify your account, see our guide to fix the Discord Verification Required loop on mobile.
11. Reset Mobile Network Settings
If nothing above has worked, reset your phone's network settings.
Do this only after trying the easier fixes first. Depending on your phone, a network reset may remove saved Wi-Fi networks and passwords, Bluetooth pairings, VPN settings, APN settings, or other network preferences.
Google Pixel
- Open Settings.
- Tap System.
- Tap Reset options.
- Tap Reset Mobile Network Settings.
- Confirm the reset.
Samsung Galaxy
- Open Settings.
- Tap General management.
- Tap Reset.
- Choose Reset network settings or Reset mobile network settings, depending on your device.
- Review the warning and confirm.
iPhone
- Open Settings.
- Tap General.
- Tap Transfer or Reset iPhone.
- Tap Reset.
- Tap Reset Network Settings.
On iPhone, this removes saved network settings including Wi-Fi passwords and previously used VPN and APN settings. It does not erase your photos, apps, messages, or other personal files.
After the reset, let the phone reconnect to your carrier and test mobile data before reconnecting to Wi-Fi.
12. Check the SIM or Contact Your Carrier
If you still have full bars but no mobile internet, the problem may be with your physical SIM, eSIM, carrier account, or network provisioning.
If your phone uses a removable physical SIM:
- Turn the phone off.
- Remove the SIM card.
- Check that the card and SIM tray are not damaged.
- Reinsert the SIM correctly.
- Turn the phone back on.
Do not cut, bend, sand, or aggressively clean a SIM card.
If possible, test your SIM in another compatible phone or test another working SIM in your phone. This can help determine whether the problem follows the SIM or stays with the device.
For eSIM users, contact your carrier before deleting the eSIM. Removing an eSIM without having the information needed to reactivate it can leave you without service.
Ask your carrier to check:
- Whether your data service is correctly provisioned
- Whether your SIM or eSIM is active
- Whether there is an outage in your area
- Whether your device is blocked from mobile data
- Whether the correct APN is being used
- Whether the SIM or eSIM needs to be replaced or reactivated
Mobile Data Not Working on Android: Best Order to Try
If you use a Samsung Galaxy, Google Pixel, Motorola, OnePlus, or another Android phone, try these steps in this order:
- Turn Wi-Fi off and Mobile Data on.
- Toggle Airplane Mode.
- Restart the phone.
- Check that the correct SIM is selected for data.
- Check your carrier plan and any data limits.
- Check roaming if you are traveling.
- Test LTE or 4G if 5G is connected but not working.
- Reset the APN to the carrier default.
- Disable VPN or custom DNS temporarily.
- Reset mobile network settings.
- Contact your carrier if the problem remains.
Android menu names differ between manufacturers, so use the Settings search bar if you cannot find an option such as Mobile data, SIMs, APN, or Reset network settings.
If your internet connection starts working again but apps continue to freeze or close, use our complete Android app crashing troubleshooting guide instead.
Cellular Data Not Working on iPhone: Best Order to Try
For an iPhone showing bars, 5G, or LTE but no internet:
- Go to Settings > Cellular and confirm Cellular Data is on.
- Turn Wi-Fi off and test cellular data directly.
- Turn Airplane Mode on for at least 15 seconds and then turn it off.
- Restart the iPhone.
- If you use Dual SIM, check the line selected under Cellular Data.
- Check whether cellular data is allowed for the affected app.
- Check Data Roaming if you are traveling.
- Temporarily disable any VPN.
- Reset APN settings if your carrier provides that option.
- Use Reset Network Settings if the problem continues.
- Contact your carrier to check your account, eSIM, SIM, coverage, and provisioning.
What to Do If Nothing Worked
If none of these fixes restores mobile data, avoid factory resetting your phone immediately.
Instead, connect to Wi-Fi and first:
- Check for any available phone software updates
- Check your carrier for an outage
- Contact the carrier and ask them to verify your data provisioning
- Ask whether your SIM or eSIM needs replacement or reactivation
- Test another SIM when possible
If your phone is also becoming unusually hot while connected to mobile data or charging, troubleshoot that separately using our guide on what to do when your phone overheats while charging.
If your carrier confirms that the SIM, account, plan, and network are working correctly but your phone still cannot use mobile data with any working SIM, the device may require further troubleshooting or hardware service.
Frequently Asked Questions
Why does my phone have full bars but no internet?
Full bars show that your phone is receiving a strong cellular signal, but your mobile data session can still fail because of a carrier outage, account issue, incorrect APN, SIM problem, network setting, or another connectivity issue.
Why does my phone say 5G but the internet does not work?
Your phone can register on a 5G network even when usable internet service is unavailable or unstable. Try Airplane Mode, restart the phone, test another location, and temporarily switch to LTE or 4G if your device allows it.
Will resetting network settings delete my photos?
No. A network settings reset does not normally delete your photos, videos, apps, or messages. However, depending on the device, it can remove saved Wi-Fi passwords, Bluetooth pairings, VPN configurations, APN settings, and other network preferences.
Why does mobile data work for some apps but not others?
The affected app may not have permission to use cellular data, or Android data restrictions may be limiting its background or mobile data access. A VPN or filtering app can also affect only certain apps or services.
Can incorrect APN settings cause full signal but no internet?
Yes. Your phone can still connect to the carrier's cellular network while incorrect APN settings prevent mobile data from reaching the internet.
Should I factory reset my phone if mobile data is not working?
Usually not. A factory reset should not be an early troubleshooting step. First check your carrier, SIM or eSIM, APN, data plan, network settings, and network reset options.
How do I know if the problem is my phone or my carrier?
Test your phone in another location, check whether other people using the same carrier have service, and if possible test another working SIM in your phone. If multiple devices on the same carrier have the same problem, a carrier-side issue is more likely.
Final Thoughts
If your mobile data is not working but you have full signal, do not assume the phone itself is broken. Start by toggling Mobile Data and Airplane Mode, restarting the device, checking the correct SIM and data plan, and verifying your carrier settings.
If those simple steps do not help, check roaming, network mode, APN settings, VPN services, and finally reset the mobile network settings. When the phone still shows 4G, LTE, or 5G but cannot access the internet after all of these steps, contacting your carrier is usually the best next move.