VoLTE Check: IMS & 4G/5G

VoLTE Check reads your handset's telephony state and tells you whether Voice over LTE is supported by the device, enabled by your carrier, and registered right now. It's the app people reach for after switching networks, importing a phone from another region, or flashing a new ROM — the moments when HD calling quietly stops working and nothing on screen explains why.

What it does

• VoLTE support and IMS registration status
• Current network type — 5G, 4G LTE, 3G and 2G
• Device and carrier capability details
• SIM and operator information
• Works offline — everything is read on-device
• No account, no sign-in, no setup

Common questions

Written by us, and answerable without installing anything.

• How to enable VoLTE — and what to do when the option is missingWhere the VoLTE switch lives on Android, what the setting is called on each network, and why a missing toggle is a carrier decision rather than something you can fix in settings.
• What the network icons mean — E, G, H+, 4G, LTE, VoLTE and 5GThe letters next to your signal bars tell you which generation of network is carrying your data. Here is what each one means, roughly how fast it is, and why seeing E instead of 4G is usually coverage rather than a fault.
• VoLTE stopped working after a software updateUpdates replace the carrier configuration that tells Android VoLTE is allowed on your network. When that configuration changes or your device drops off the approved list, VoLTE disappears — and no setting brings it back.
• Is VoLTE the same as 4G? No — and the difference matters4G is how your data travels. VoLTE is how your calls travel. You can have one without the other, which is exactly why a phone with full 4G signal can still fail to make a call.
• “Emergency calls only” — what it means and how to fix itThe phone has found a network but that network will not accept your SIM. That narrows the cause considerably — and rules out most of what people try first.
• IMS registration status — what not registered meansIMS not registered nearly always means your carrier has not provisioned the service, or has not approved your exact handset — not a settings problem.
• Wi-Fi calling not working? Here is what to checkVoWiFi shares its registration with VoLTE, needs an emergency address on file, and is blocked by more networks than people expect. The checks that actually narrow it down.
• How to check whether your phone supports VoLTEFour ways to verify VoLTE support before you buy, import or switch carriers — and why the manufacturer's spec sheet is the least reliable of them.
• Dual SIM and VoLTE — what actually worksTwo SIMs, two carriers, and a phone with one radio it has to share. Why VoLTE often works on one SIM but not the other, and what DSDS really means for calls.
• Why VoLTE stops working, and how to actually fix itVoLTE needs four separate things to line up — device support, carrier provisioning, a whitelisted model, and IMS registration. Here is how to tell which one is broken.
• VoLTE vs VoWiFi vs VoNR — the difference, plainlyThree ways your phone can carry a call over data instead of a legacy voice circuit. They share the same core, which is why they usually break together — and why fixing one often fixes the rest.