While there's no option to disable voicemail on Android, there are a few ways to do it. Here's how to turn off voicemail on Android.

You should get a deactivation confirmation message. Alternatively, you can deactivate the call-forwarding feature using your phone's settings. Below are the steps to follow. Open your iPhone device.

However, USSD based call forwarding will no longer be available to users. A recent directive from the Department of Telecom mandates telecom operators to disable USSD-based call forwarding.