Why does my iPhone not let me set up voicemail?
Please visit your myAT&T app and make sure that you have voicemail enabled. If this feature is turned off callers will get a busy signal or be informed you are unable for calls. We also suggest checking your call forwarding settings to make sure callers are not being routed correctly to your voicemail.Nov 1, 2021
How do I activate my AT&T voicemail?
Start by making sure the voicemail and greeting are set up properly on the voicemail tab of the Phone app. You can also check to make sure call forwarding isn't turned on and make sure the voicemail service is working at the carrier by dialing the number directly.Nov 11, 2021