Which way of calling someone is more anonymous?

[kenny1999]

To put my long story short, I'd like to call someone I don't trust. I do not really want to call him but I have to. I have his cellphone number. I think the best way is to do it through public telephone stand but such thing is getting rare.

Which way is more anonymous?

1. By putting a few more number before his number, which is a way to hide the caller's number.

2. By making a call through Skype.

3. Any other method?

 

If I make a call through Skype, will my nickname, email address or even any of my phone number provided to Skype/Microsoft be shown to his side?

[iNow]

Can you find an office phone or open cubicle somewhere? Break room, perhaps?

[kenny1999]

37 minutes ago, iNow said:

Can you find an office phone or open cubicle somewhere? Break room, perhaps?

Hi, it's very difficult today. That's why I am raising my questions here.

[iNow]

Huh?

[Phi for All]

3 hours ago, kenny1999 said:

Hi, it's very difficult today. That's why I am raising my questions here.

We were hoping for a yes or no reply to a question about whether you're in an office today or not. My feeling, at least, is that you shouldn't use your own phone or Skype accounts at all if you want to remain anonymous. 

If you aren't at work, can you go to a hotel? The bigger ones have phones in the lobby.

[StringJunky]

Buy a 'burner phone'. This is a cheap phone with a PAYG sim card, call, than smash it and sling it.

[MigL]

I really hate getting anonymous phone calls; my thinking is, that if you can contact me, I should be able to contact you back.

We get calls from sales people, scammers,  etc. and when you try to call that number back, are told it's not in service.
We get calls from numbers, and when you call back, the person who answers says they never made that call.
These bother me to no end, because I always answer my phone when it rings, thinking it could be an emergency ( texts not so much ).

I assume it's some hacking of VOIP that allows for this; maybe @Sensei can shed some light on this.

So maybe you shoulden't contact them by phone if you wish to remain anonymous.
There's always old fashioned mail.

[swansont]

5 hours ago, iNow said:

Can you find an office phone or open cubicle somewhere? Break room, perhaps?

The number would still be traceable to a business, which might indicate to the recipient who called.

[Sensei]

3 hours ago, MigL said:

I assume it's some hacking of VOIP that allows for this; maybe @Sensei can shed some light on this.

GSM is an outdated and flawed protocol. You can pretend to be another number, any number..

https://duckduckgo.com/?q=gsm+spoof

Check this procedure:

https://smartphones.gadgethacks.com/how-to/make-spoofed-calls-using-any-phone-number-you-want-right-from-your-smartphone-0242383/

The apps you need for this are in the Apple Store and Google Play Store (and seem to have pretty good rankings).

Try it out and tell us how/whether it works.

 

I didn't use the phone for calling for about ten years. And it was just pizzas from third-party devices.

[MigL]

Thanks sensei.

[kenny1999]

13 hours ago, MigL said:

I really hate getting anonymous phone calls; my thinking is, that if you can contact me, I should be able to contact you back.

We get calls from sales people, scammers,  etc. and when you try to call that number back, are told it's not in service.
We get calls from numbers, and when you call back, the person who answers says they never made that call.
These bother me to no end, because I always answer my phone when it rings, thinking it could be an emergency ( texts not so much ).

I assume it's some hacking of VOIP that allows for this; maybe @Sensei can shed some light on this.

So maybe you shoulden't contact them by phone if you wish to remain anonymous.
There's always old fashioned mail.

Where I live allows anonymous call legally, but it is well-known that there is a way for the receiver to crack this function without too much cost, but the problem remains and is not fixed for many years.

10 hours ago, Sensei said:

GSM is an outdated and flawed protocol. You can pretend to be another number, any number..

https://duckduckgo.com/?q=gsm+spoof

Check this procedure:

https://smartphones.gadgethacks.com/how-to/make-spoofed-calls-using-any-phone-number-you-want-right-from-your-smartphone-0242383/

The apps you need for this are in the Apple Store and Google Play Store (and seem to have pretty good rankings).

Try it out and tell us how/whether it works.

 

I didn't use the phone for calling for about ten years. And it was just pizzas from third-party devices.

Is it better to do it with your apps suggested or with Skype? Which is more anonymous (i.e. harder to trace) in case the receiver is a tech geek and wants to find out my number.

[kenny1999]

22 hours ago, swansont said:

The number would still be traceable to a business, which might indicate to the recipient who called.

This is not an issue at all. I am calling someone that I know him, and he knows me, but he doesn't have any of my personal information or contacts and I wouldn't like to give him. We got to know each other offline.

[swansont]

4 hours ago, kenny1999 said:

This is not an issue at all. I am calling someone that I know him, and he knows me, but he doesn't have any of my personal information or contacts and I wouldn't like to give him. We got to know each other offline.

So “anonymous” isn’t the key here. Then iNow’s suggestion works. Use anyone else’s phone.