The voicemail is automatically activated on your Sony Xperia Z2, if you can not answer a call or want to. The call is simply forwarded to the voicemail provided by the mobile operator. Now it may be that you don’t want to use a mailbox on your Sony Xperia Z2. If that's the case, we will tell you in this guide how to disable the mailbox on Sony Xperia Z2.
Simply open from the homescreen of the Sony Xperia Z2 the menu and then select the settings.
Call settings --> Call forwarding
You now have various options, in which at least three forward to the mailbox. Tap on the options and select in the next window, "Disable", so this type of redirection for your Sony Xperia Z2 is disabled.
The mailbox is completely disabled if you see in the call forwarding menu no longer redirects to a telephone number.
Finished! You have now successfully disabled the voicemail on the Sony Xperia Z2.