What happens if you dial *# 31#? More than a thousand of codes exist that can be used to evoke certain settings and privileges on your phone. This codes were specially designed by the various Operating System allow for some flexibility in the use of phones.
These codes are USSD codes that work when they are dialed in the phone’s dial pad. A USSD code is a GSM (Global System for Mobile Communication) protocol that works by sending queries in form of digits to a server to activate a respond on the sender’s phone. USSD can be likened to the SMS (Short Message Service) system.
One of such code is *#31#. In this article, we’ll talk on what happens when you dial this code in your phone.
What happens if you dial *# 31#?
To begin, this code can only work on an iPhone. When you dial *#31# followed by a phone number that you are about to call, your number is blocked. In the sense that the receiver will not be able to know who is calling or the number that is trying to reach them. This is not a subscription and can only be done on a per-call bases.
This code may also not respond in some countries. More also, there are other apps and codes that can break though this service to view your details even when you place call with this code. Caller ID for an example may deflect this code.