Mobile Data Not Working on Android

When mobile data stops working, the first move is to rule out Wi-Fi: turn Wi-Fi off and see whether the phone finds a signal on its own. If it does not, cycle airplane mode for about 10 to 30 seconds, then power the phone all the way off for 30 seconds. If data is still dead after that, the cause is usually a setting rather than a fault — an on-device data limit, Data Saver, the wrong SIM chosen for data, or a VPN sitting in the way.

Confirm it is really mobile data#

Google’s Pixel troubleshooting steps start by taking Wi-Fi out of the picture: open Settings > Network & Internet > Internet and turn Wi-Fi off, then look at the signal triangle in the top right corner. A phone parked on a saved Wi-Fi network that has no working internet looks exactly like broken mobile data, because nothing is touching the cellular radio at all.

If no signal indicator appears, you may simply be in an area without coverage. Google also lists physical obstruction as a genuine cause: buildings, walls and some phone cases can interfere with mobile service, including 5G. Step outside and take the case off before you start changing settings.

Then restart the phone — the first item on Android Help’s own list, and it sounds too simple until it works. If a normal restart changes nothing, turn airplane mode on and back off (Android Help says wait 10 seconds, Google Fi’s page says 30), and if that fails, power the phone fully off, wait 30 seconds, and turn it on again.

Menu paths differ, so match the wording, not the route#

There is no single path that fits every Android phone, and Google does not pretend otherwise. Its own troubleshooting page writes the step as Settings, then “Network & internet” or “Connections”, then “Mobile data” or “Cellular data”, and adds: “On some devices, you may need to select Data usage before you find this.”

The table below covers the two skins whose makers document these paths themselves. Other skins — Xiaomi, OnePlus, Motorola — arrange the same settings their own way, so hunt for the wording rather than the route.

What you’re checking	Pixel / stock Android	Samsung One UI
Mobile data on/off	Network & internet > SIMs	Quick panel tile, or Connections > Data usage
Data Saver	Network & internet > Data Saver	Connections > Data usage > Data saver
Data limit	Network & internet > SIMs > Data warning & limit	Connections > Data usage > Mobile data usage > settings icon > Set data limit
APN	Network & internet > SIMs > Access point names	Connections > Mobile networks > Access Point Names
Reset network settings	System > Reset options > Reset mobile network settings	General management > Reset > Reset network settings
Check for updates	System > Software updates	Settings > Software update

A data limit you set months ago can switch data off#

This is the one that catches people. Android’s Data limit is not a warning — when you reach it, mobile data turns off automatically and you get a notification. The separate Data warning only notifies; it never cuts anything off. The documented way to get data back is to return to that same screen and turn the limit off.

On Pixel it sits under Network & internet > SIMs > Data warning & limit. On Samsung it is in Connections > Data usage > Mobile data usage, behind the settings icon, where “Set data limit” sits alongside the billing-cycle start day. If data died partway through the month and has stayed dead since, check this before anything else.

Data works, but one app is offline#

If web pages load and one app does not, the radio is fine and something is starving that app.

• Data Saver. It lets most apps get background data only over Wi-Fi, while currently active apps and services can still use mobile data. So it looks like an app that never updates in the background, not a phone with no data. A Data Saver icon shows in the status bar when it is on, and both skins keep an exception list: “Unrestricted data” on Pixel, “Allowed to use data while Data saver is on” at the bottom of Samsung’s Data saver screen.
• A per-app background-data restriction. On Samsung: Connections > Data usage > Mobile data usage, tap the app, and check “Allow background data usage”. Google documents three different paths for this depending on Android version, which is a good reason to search Settings by name rather than trust a route you read somewhere.
• Battery Saver. Google’s description is that apps don’t run in the background while it is on, unless you turn off battery optimization for them, and Extreme Battery Saver pauses most apps outright — paused apps won’t send notifications. The per-app fix is Settings > Apps > the app > Battery > Unrestricted.

If it is the Play Store that won’t move, downloads stalling in the Play Store have their own set of causes. If apps are connecting but staying quiet, notifications not showing on Android goes further into the battery-restriction side.

SIM, roaming, network type and APN#

• Dual SIM. Only one SIM can be the default for data. On Pixel you set it under Network & internet > SIMs, then under “Your primary SIMs” tap “Mobile data”; there is also an “Ask every time” option, so confirm which SIM is actually carrying data. If a SIM is inactive, open it and turn on “Use SIM” (worded “Use this SIM” on some builds).
• Roaming. Google defines the roaming switch as letting your phone send data over other carriers’ networks when you leave your carrier’s coverage. If the phone has landed on a partner network, turning roaming on is worth a test — with an eye on what your plan charges for it.
• Preferred network type. Samsung calls it Network mode, under Connections > Mobile networks. Which options appear depends on the phone, carrier and SIM, and some carriers hide or lock the menu. No vendor doc says 5G causes data failure, but switching type and watching what changes costs nothing.
• Network operator selection. Samsung documents manual selection as something you can undo: under Mobile networks, put the automatic-selection switch back on rather than leaving the phone pinned to one operator.
• APN. The access point name is the set of details your carrier needs to connect you, and a wrong one stops data from working. It is what people damage by hand after a SIM swap or a carrier change, so don’t copy values off a forum. On Samsung, open Access Point Names, use the three-dot menu and choose Reset to default; for real values, ask your carrier. Google does not document a matching reset button on Pixel.

Full bars, but nothing loads#

A VPN is a documented cause of exactly this: a connection that looks live and carries nothing. Check Settings > Network & internet > VPN — you can search Settings for “VPN” if you can’t find it — and turn it off to test. Security and ad-blocking apps can be holding one open too. If that turns out to be it, setting up a VPN properly covers reconnecting afterward.

While you are in there, set Private DNS back to Automatic. Google documents three states — Off, Automatic, and a provider hostname — and while a mistyped hostname isn’t a listed cause here, it takes five seconds to rule out.

If you suspect a downloaded app, restart in safe mode, which temporarily turns off all downloaded apps. Google deliberately declines to publish a key combination for that, so check your manufacturer’s support site for yours. Then check for a system update — Samsung lists updating as its first step for mobile data problems.

Resetting network settings is the last thing to try on the phone itself. Its name varies: newer Pixels split out “Reset mobile network settings”, while other builds offer one combined “Reset Wi-Fi, mobile & Bluetooth”. Either way it clears saved Wi-Fi networks and Bluetooth pairings as well, so expect to retype your Wi-Fi password and pair your Bluetooth accessories again.

Symptom	Likely cause	First thing to try
No bars, no data icon	Coverage, or the radio is stuck	Airplane mode off and on, then power off 30 seconds
Full bars, nothing loads	VPN, Private DNS or APN	Turn the VPN off, set Private DNS to Automatic
Died mid-month, still dead	On-device data limit	Turn the data limit off
Only one app is offline	Data Saver or a background restriction	Add the app to unrestricted data
Broke after a SIM or carrier change	APN or provisioning	Reset the APN to default, then call the carrier
Broke right after a system update	Bad network state	Reset network settings

When it is the carrier, not the phone#

Google’s own troubleshooting ends at the carrier, and yours should too: call to check for an outage in your area and confirm nothing has changed on your plan. Samsung says the same, and adds that if you recently changed carriers but kept the phone, the new carrier may need to reset the device on their side.

Two hardware notes. The FCC’s guidance on unlocking is that a phone built for one provider’s network may not be technologically compatible with another’s, unlocked or not. And when US carriers retired their 3G networks, the shutdown also affected some older 4G phones that do not support VoLTE; the FCC’s advice is to ask your provider whether a particular device is affected. No vendor lists a factory reset as a fix here, so treat a full factory reset as a last resort, after the carrier has ruled out their side.

Work in that order and most cases close out in a couple of minutes: rule out Wi-Fi, restart, then check the four settings that quietly turn data off — the data limit, Data Saver, which SIM is set for data, and any active VPN. Save the network reset for what survives all four, and the carrier call for what survives the reset.