The default barring password is often set by your carrier and can be reset upon request.
Watch these step-by-step video guides to see exactly where call barring settings are hidden on different phone models: How To Turn On/Off Call Barring On Android - Step By Step GuideRealm
Note: iPhone relies heavily on carrier settings. If you don’t see the option, use Method 2 or 3.
Tap the in the top-right corner and select Settings .
| To disable… | Dial this code | | --- | --- | | All outgoing calls | #33*PIN# then press | | All incoming calls | #35*PIN# then press Call/Send | | All call barring (all types) | ##002# then press Call/Send (most useful) |