You can make wideband, high-quality phone calls with VoLTE on an iPhone 6 or later. To make these calls, both phones need to work with VoLTE.
Check your carrier and location
Whether you can use VoLTE depends on a few things:
- Your location, your account with your carrier, and the model of your phone
- The carrier, carrier account, location, and phone model of the person you’re calling
Some carriers support VoLTE only in certain cities or area codes. Contact your carrier to ask about your area and account.
You can check Wireless carrier support and features for iPhone to see if your carrier supports VoLTE.
Turn on VoLTE
Some carriers turn on this feature by default. To find out if VoLTE is on, go to Settings > Cellular > Cellular Data Options > Enable LTE. If Voice & Data is off, tap it to turn on VoLTE.
If you see an error message
When you try to turn on VoLTE, you might see a message that says “Cannot Activate LTE Calls. To enable LTE Calls on this account, contact your carrier.” This can happen with some account types, including business lines, and on some carriers. Please contact your carrier for help.
You might see a message that says to insert a new SIM card. This can happen with older SIM cards, or a micro-SIM card that’s cut down to the size of a nano-SIM card. You might need a new SIM card to use VoLTE. Contact your carrier.
Get help with VoLTE call issues
If calls drop frequently or call quality is poor when using VoLTE, try turning off VoLTE. If calls improve with VoLTE turned off, get help from your carrier. To turn off VoLTE, go to Settings > Cellular > Cellular Data Options > Enable LTE and tap Data Only.
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