Despite its obscurity, Call Barring is a superpower in three specific scenarios:
Most mobile and landline providers offer several standard barring categories:
Call barring can be implemented through various methods, including: what is a call barring
Because this happens at the network level, it works regardless of the phone being used. If you move your SIM card to a different phone, the barring restrictions remain in effect.
In the era of feature phones (non-smartphones) and traditional landlines, Call Barring was managed through and passwords. This system is still in use today on many networks. Despite its obscurity, Call Barring is a superpower
We don't call like we used to. Most "calls" are now FaceTime, WhatsApp, or Zoom. Call Barring only works on circuit-switched voice calls (the old-school cellular network). It does not block VoIP apps.
If the user enters the wrong password multiple times, the network may lock the barring feature entirely for security reasons, requiring a call to customer service to reset the PUK code. This system is still in use today on many networks
(Code: **332* ) The traveler's compromise. You can call back to your home country (Mom, the bank), but you cannot call a random number in Thailand.