Few Android errors are as blunt as this one. You go to make a call and the phone answers with “Mobile network not available”, even though the signal bars look fine. It is one of the most searched Android faults for a good reason: the message tells you almost nothing about which of about eight different things has actually gone wrong.
The quick answer: “Mobile network not available” means the phone cannot register on your carrier’s network for calls, even though it may still show bars or have working Wi-Fi. The most common causes, in the order worth checking, are a temporarily dropped network registration (fixed by airplane mode or a reboot), the wrong network mode selected after an update, a SIM that has worked loose or dirtied its contacts, a wrong or reset APN, and account or IMEI level problems at the carrier. Start with airplane mode on and off. It resolves this more often than anything else, takes ten seconds, and costs nothing.
Work through these in order
They are ordered by how often they work against how much effort they cost. Do not skip ahead to a factory reset.
| # | Fix | Time | Fixes it roughly |
|---|---|---|---|
| 1 | Airplane mode on, wait 15 seconds, off | 15 sec | Very often |
| 2 | Restart the phone | 1 min | Often |
| 3 | Reseat the SIM card | 2 min | Often |
| 4 | Select network operator manually | 2 min | Sometimes |
| 5 | Change preferred network type | 1 min | Sometimes |
| 6 | Reset APN settings | 3 min | Occasionally |
| 7 | Reset network settings | 5 min | Occasionally |
| 8 | Contact the carrier | varies | The remainder |
1. Airplane mode on and off
Swipe down and tap the aeroplane icon, wait about fifteen seconds, then tap it off. This forces the phone to drop every radio connection and register with the network from scratch.
The reason it works so often is that this error is usually a registration problem rather than a signal problem. Your phone can see the tower and still not be properly attached to it. Airplane mode is the cheapest way to make it try again.
2. Restart the phone
If airplane mode did not do it, a full restart clears the modem state as well, which airplane mode does not always do. Power off completely rather than using any fast restart option.
3. Reseat the SIM card
Power the phone off first. Eject the tray, take the SIM out, and check the gold contacts for dust, smudges or corrosion. Wipe gently with a dry cloth, seat it firmly back in the tray, and power on.
This matters more than it sounds. A SIM only needs to shift a fraction of a millimetre, which happens easily if the phone is dropped, to lose reliable contact. If you have another phone to hand, trying the SIM in it is the fastest way to tell whether the problem is the SIM or the handset.
4. Select the network operator manually
Go to Settings, then Network and internet (or Connections on Samsung), then Mobile network, then Network operators. Turn off Select automatically and let it scan.
When the list appears, pick your carrier by name. If your carrier does not appear in the scan at all, that is a useful diagnostic in itself: it points at the SIM, the account or coverage rather than a software setting.
5. Change the preferred network type
In the same Mobile network menu, find Preferred network type. If it is set to 5G only or LTE only, switch it to an option that includes older networks, such as 5G/LTE/3G/2G or “Auto”.
This is a genuinely common cause after a software update, because updates sometimes reset this preference. If the phone is locked to a network band that is weak or absent where you are, calls fail while data may still appear to work.
6. Reset the APN
Go to Mobile network, then Access Point Names. Tap the three dot menu and choose Reset to default.
APNs usually configure themselves, but a partially wrong entry, often left behind by moving a SIM between phones or from an old manual setup, breaks the connection in exactly this way. Your carrier publishes its correct APN values if the reset does not populate them.
7. Reset network settings
Go to Settings, then System, then Reset options, then Reset Wi-Fi, mobile and Bluetooth.
This clears every network configuration and rebuilds it. Your files and apps are untouched, but you will lose saved Wi-Fi passwords and paired Bluetooth devices, so have those to hand before you do it.
8. When it is the carrier, not the phone
If nothing above works, and especially if the SIM fails in a second phone too, the problem is on the account side. The usual causes are an unpaid bill or suspended line, a SIM that has aged out and needs replacing, a prepaid plan that expired, or a blocked IMEI on a second hand handset.
Ask the carrier directly whether the line is active and whether the IMEI is blocked. Both are things only they can see.
If it only happens in one place
If the error appears at home or at work but nowhere else, this is coverage, not a fault. Two things genuinely help:
- Turn on Wi-Fi calling in Settings, then Network and internet, then look for Wi-Fi calling. Calls route over your broadband instead of the tower, which solves indoor dead spots completely.
- Ask the carrier about a signal booster. Some provide one free for a confirmed coverage gap at a home address.
If it started right after an update
Check the preferred network type first, as in step 5. Updates reset it more often than any other setting, and a phone left on 5G only in a 5G weak area produces exactly this error.
After that, reseat the SIM and reset the APN. Between them those three cover the large majority of post update cases.
Frequently asked questions
Why do I have signal bars but still get this error?
Bars show that the phone can hear a tower. They do not show that the phone is registered on the network for calls. Registration can fail while the signal itself is strong, which is why airplane mode fixes it so often.
Is my SIM card dead?
Possibly, and it is easy to check. Put the SIM in another phone. If it fails there too, the SIM or the account is the problem. If it works, the fault is in your handset.
Will a factory reset fix it?
Rarely, and it should be last. Almost everything a factory reset does to network configuration is achieved by resetting network settings in step 7, without wiping the phone.
I can use data and WhatsApp but not make calls.
That points at voice registration specifically, so check the preferred network type and whether VoLTE is enabled in the mobile network menu. Some carriers have retired older voice networks entirely, and a phone with VoLTE turned off then has no way to place a call.
Changelog
- 1 August 2026: Page created.
Related: No SIM Card Detected on Android: 8 Fixes and the One Test That Diagnoses It
Akshay Mhatre is a Tech Journalist who likes to keep up with the latest from the tech world. He has worked at many popular news portals like BGR and TechRadar before joining TheLeaker as a News writer and journalist. A writer by day and a VFX artist by night. In his free time, he also likes to make motion graphics and concept art. You can find him on Instagram @akshayrazr_95 and contact him on akshaymhatre[@]theleaker.com.