You can temporarily deactivate your voicemail – for example, if you are travelling and want to avoid roaming costs – by typing ##002# or ##004# on your smartphone keyboard and then clicking on the call button.

Callers won’t be able to leave you any messages, but you will receive SMS notifications telling you who or what number called you.

To reactivate your voicemail, type **004*086x # on your smartphone keypad and then click on the call button (x is your mobile number). For example, if your number is 078 123 45 67, type **004*0860781234567#).