Call ID Spoofing

twped

Seems someone is using my mobile number to spoof others.

Since past few days I am getting calls from people who tells me that they have a call from my number, although I did not call them.

What can I do about this?

Black Mamba

contact the known persons concerned by these calls by another channel

(mail, wi-fi call, another known number, instant messaging app, etc.) to check the validity of calls

do not answer these calls if considered abusive

temporarily block the caller's number if repetitive, annoying and necessary

activate the callfilter via the Swisscom Cockpit
Enter mobile number

You are connected to WLAN and therefore cannot automatically access the cockpit.Enter your mobile number to log in.Next

in the event of abusive calls, contact the Swisscom Hotline directly

Contact for your requests & complaints

Select your request and contact Swisscom by hotline, chat or text message.

LeylaG

Hello @twped

Sorry to learn you are experiencing spoofing lately.

Spoofing is a global issue which impacts all providers. Usually the calls stopped after a few days.

To protect yourself from this threat we recommend to activate our callfilter http://bit.ly/2B4PzWu

You can see more information on this article https://bit.ly/3p9yukx

Hope it helps!

Necron

Also just got called by someone claiming I called him... thanks for the tips in this thread so far!

Just activated that Swisscom CallFilter. Let's see 🤔

Other than that, are there any other measures at all to avoid spoofing?

Gaeilgeoir

@Necron Not really, you can't avoid that others (especially call centers from abroad) are using your phone number for spoofing, More than the activation of the call filter you actually can't do. The knowledge base article describes more what you can do to avoid misuse when you are called with a spoofed number, but how to avoid that your number is used for the same purpose, it is not really described, because it is really difficult for the different operators in Switzerland to handle this. The good thing is, with the technical measures already set in place this problem lasts only for short time

https://community.swisscom.ch/t5/Telephony-Knowledge-Base/Spoofing-Be-wary-of-unexpected-calls/ta-p/568174

If you are speaking German you can read article about the same topic:

https://www.srf.ch/news/panorama/taeglich-ueber-100-anrufe-spoofing-telefon-terror-durch-geklaute-nummer

Necron

Thanks for your reply and links!

Yeah, let's see if there are more calls the next few days... this was now the first one today.

I guess the worst feeling is not knowing what's actually being done through using my number 😕