Now a common feature on most home phones and virtually all mobile devices, caller ID gives us the ability to screen calls and avoid annoying friends or pesky telemarketers.
An obvious downside to this functionality is that anonymity when placing a call is now a thing of the past.
Fortunately, vertical service codes like *#67# can come in handy if you need to call people who you don’t necessarily want to call you back. For example, if you need to call a business client after work hours from your personal phone, you might not want them to have that number.
Just keep in mind that some people choose to block hidden or private numbers from calling them automatically, in which case your call won’t go through if you use *#67#.
What is *# 67# used for?
You can prevent your number from appearing on a recipient’s phone or caller ID device when you place a call using a smartphone or a traditional landline by pressing *#67# followed by the number you want to call.
The person you’re calling only sees a message such as a blocked or private number when their phone rings.