To disguise your caller ID on IOS (iPhone), go to your Settings App. Next, go to the “Phone” section of the settings, and select “Show My Caller ID”. Then, slide it to the “Off” position. [1] X Research source For Android, go to Settings > Call Settings > Additional Settings > Caller ID. Then, select Hide Number. Your calls will remain anonymous and you can bypass the blocked list.
One advantage to this method is that the area code is also randomly generated. Thus, the person will not suspect where the call is coming from.
If there are payphones in your area, spend a few coins and make a hard-to-trace call. Check into a hotel room and make the call from the hotel phone. Use a school phone or a work phone. Ask to use the landline at a shop or restaurant.
As with public phones: if you continually use the same friend’s phone to call someone who’s blocked your number, the call-blocker will probably stop answering calls from that number. He or she may even block your friend’s number.
For example: “Hey, Allie. This is Joe McAdams, calling on behalf of Billy. I just want to pass along a short message, and then I’ll let you go about your day. He says; ‘[your message here]’. Sorry to bother you!” You can also use a voice changer to disguise your voice. If the person has blocked your number, however, there’s a good chance that there is history here – and that they will quickly identify you.
Be considerate. If you are truly making this person uncomfortable, you should give them space. Things resolve themselves in their own time – but pushing the situation too far might erase that possibility.
The Caller ID Act of 2009 made it a crime to use Caller ID spoofing for harming or defrauding someone. If you use a service to block or change the way that your phone number appears, be very careful about how you use this power. [5] X Research source
If you simply need to express your feelings and get closure, try writing a letter or email to the person in question. The person may feel less threatened if he or she has more time to read and respond to your words. If it’s an emergency and you legitimately need to reach or find someone: reach out to mutual friends, or contact the police. Seek out someone neutral who can help you reach this person.