How To Disable Mailbox on iPhone
Note: You can perform this simple trick on any version of iOS and on any iPhone.
Open the phone app on your iPhone. At the bottom of the screen, select the "Number pad" tab. To permanently switch off the mailbox, enter the code ## 002 # on the numeric keypad and then tap the green handset or the call key. This applies at least for T-Mobile and O2. For Vodafone, call the 5500 and then select the key combination 272 #.
After a short while, mailbox deactivation is confirmed on a special screen. Touch "OK". Your mailbox has now been deactivated and you can leave the phone app.
How to Activate the Mailbox on iPhone
Depending on your wireless service provider, you may expect different activation methods. We will therefore show you how to reactivate the mailbox of the three most important providers. You can find out how to reactivate the mailbox with other providers on the homepage of the provider.
Step 1 : Open the telephone app on your iPhone and enter the following key combination: ** 62 * 3311 #
Step 2 : Tip your typing on the call key and confirm successful activation with a tap on [OK].
Step 1 : Open the phone app and call the number 5500.
Step 2 : Enter the following key combination: 271 #
Step 1 : Open the Phone app and enter the following key combination: ** 004 * 333 #
Step 2 : Tip your typing on the call key and confirm the successful A activation with a hint on "OK".