Verify that you’re on the internet.
While rare, dead spots do exist.
Don’t have service?

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One option is toturn on Wi-Fi calling.
Turn off Airplane Modeif it is on.
When enabled, mobile networks are turned off and incoming phone calls go to voicemail.
Even if Airplane Mode is off, switch it on for 5-10 seconds, then shut it back off.
Turn on mobile data.
If you don’t, “not connected” or “roaming” might be displayed.
These messages can occur when you’ve turned off your mobile data and forgotten to turn it back on.
On some Androids, this option is calledReset mobile internet options.
Look for it in theSettingsapp, either throughSystem>Reset optionsorGeneral management>Reset.
Reboot in safe modeto make the call.
When phones are working slowly or sometimes not at all, this sometimes works for some people.
Check for malware.Sometimes malware hits Android phones.
There are a few steps you’re able to take toremove malicious appsfrom your machine.
Update the Android OS.
If the above steps aren’t working, it might be time to check on a few things.
For example, have you paid your bill?
Your carrier should alert you about this, but it may be via snail mail.
reach out to the manufacturer.
If all else fails, the issue might be due to hardware damage.
Find out if it’s worth repairing or how to get a replacement.
We’ve posted the easiest fixes first!
you could deregister and turn off iMessage on Apple’s website.
verify the unit is online and not in Airplane Mode.
If you still have trouble, update the app, erase the app data, and kickstart your equipment.