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Questions tagged [phone]

A telephone, or phone, is a telecommunications device that permits two or more users to conduct a conversation when they are not in the same vicinity of each other to be heard directly.

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25 views

How can you spoof you caller id but not using a voip (your carrier instead)?

My research: I found this security stackexchange post but it didn't answer my question. I know that you can do similar things using astresik with voip provider. I came up on o blog that explain that ...
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40 views

Is there some way to "fully delete" received and sent SMS messages (and any other "deleted" data") on my cellphone?

I have a cheap cellphone bought about ten years ago. It has a physical SIM card. I have in-phone "deleted" all sent and received messages, but very strongly suspect that these are still ...
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1answer
79 views

Is there a thing as a small bag which BOTH blocks signals AND sound for securing a mobile phone on the go? [closed]

I've been hunting for this for a long time. I've been able to find "Faraday" bags that (allegedly) block signals to/from the surveillance unit (phone), but they never mention anything about ...
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2answers
104 views

Is it normal/safe/justifiable that a bank asks me for my full login details (account id and PIN) when calling via mobile phone?

I am calling my bank via mobile phone (in Germany) and the electronic voice asks me to type in my account access id (via the number pad), and like-wise, type in my account PIN, all the numbers, not ...
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2answers
2k views

Any plans/research for SSL-like method in telephony?

I have recently read about attacks using Caller ID spoofing technology. Criminals used it to impersonate bank or police employees and asked to install malware or transfer money to a given account. A ...
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1answer
117 views

WhatsApp message from own number + 1 [closed]

I got a WhatsApp message from a number which is exactly mine but the last digit is increased by one (5 instead of 4). It was just a "Hi" and and a photo of a random guy. I asked who it is ...
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2answers
96 views

Is the "trusted phone number" inside your Apple ID a security flaw?

Imagine your iPhone gets stolen or seized. Inside this iPhone is your SIM-Card. That SIM-Card is your only SIM-Card and it is enlisted as "trusted phone number" in your Apple Account. The ...
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0answers
80 views

My iPhone XS called someone today without my interaction

Yesterday, I was sitting at the computer and noticed that the phone is making the "calling" sound (that usual beep). I unlocked the phone and did not see any activity like I would call ...
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2answers
113 views

What makes this cellphone (and the weird instructions) so privacy-friendly?

I stumbled upon this weird product in a webstore primarily selling Cannabis-related products (not the actual herbs): https://smoketower.com/nyheter/Anonym-3310-mobiltelefon I've manually translated ...
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78 views

Can I determine whether my phone probes base transmission station (BTS) without a SIM card?

This question is related to another inquiry on this site: Can Android phone running without SIM card be tracked (localized) by police? Accepted answer claims that: Without a SIM, your cell phone ...
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16 views

Can IMSI catcher locates you? [duplicate]

Are IMSI catchers able to locate your position and update in real time as you are moving? Also, can it detect the height of your location? (Like knowing which floor you are on?)
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123 views

How can I test if/how STIR/SHAKEN is working on my incoming calls? Both for detecting spoofed caller ID AND [bad sources]

How can I test if/how STIR/SHAKEN is working on my incoming calls? Both for detecting spoofed caller ID AND calls from disreputable (NON-'A' attestation) service providers/carriers/sources. I'm ...
2
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1answer
112 views

Can a SIM card lock be circumvented?

If so, how would one go about that, and realistically, how long would it take? Is there something we can do proactively to make this more difficult? This seems more relevant than ever since we would ...
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2answers
190 views

Does replacing the SIM card mitigate any threats after a serious data breach?

I recently heard that a telephone company (a mobile network operator) was hacked and lots of data was stolen, maybe affecting up to a million customers. It sounds like the leaked data is already ...
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2answers
533 views

Can an android phone that is flashed to a trusted safe rom still be malicious?

I'm in the market for a new phone. The cheapest ones with decent specs are from China. Unfortunately I've read articles of phones sending data back to China for spying purposes. The phone I am looking ...
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3answers
3k views

Real life examples of malware propagated by SIM cards?

The laptops in use at my company have SIM card slots, which are actually used by some of our users. I am threat modeling our devices, so I was wondering if there are any realistic exploits that can be ...
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2answers
1k views

Does factory resetting a phone erase spyware?

I thought that there was spyware on my phone so I did a factory reset. Would the spyware be gone or it will still exist even after a factory reset?
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1answer
1k views

What are the privacy implications of the "Your Phone" app on Windows?

I'm trying to decide whether or not to use the Your Phone app on Windows, and not finding much information on it. It requires a Microsoft account, but I don't really see why that should be necessary ...
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50 views

Trying to defend against Cell site simulators

I take a phone, insert a SIM Card in it, then connect it to the internet. Then I switch on Wi-Fi Hotspot on it. Then I connect a second phone to the Hotspot of the first phone, and use this first ...
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97 views

Did fraudsters access my SMS verification code?

A very strange sequence of events resulted in some unknown person gaining access to my online banking (with CIBC). I've since recovered my account, but I am very eager to understand what happened: I ...
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0answers
64 views

Retrieving a No Caller ID phone number? [closed]

I got a call from an unknown number, more specifically, a no caller ID number. I’m not the guy who gets a lot of calls from a no caller ID phone number, and usually, when I got one is typically the ...
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42 views

Is it reasonable to type a bank password in a phone call to the bank? [duplicate]

Recently my friend called their bank (via a normal phone call) to perform an operation with her account and she had to type her password during the call. Everything worked fine, the operation was done ...
2
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1answer
246 views

'Removing' telecom provider from my phone

Baseband Processors have very weak overall security(closed-source firmware, no audits etc.) It also gives the telecom operator very high privileges on a mobile device. So, now I use 2 phones. First ...
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2answers
265 views

Danger of making calls after unknown random number called through

I recently received a call from a number I didn't know to my mobile, answered it anyway. I didn't say anything, when it is a number I don't know I let the other person speak first.. after a few ...
5
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1answer
894 views

Can WhatsApp, Signal or Telegram be hacked through a SIM SWAP attack?

In Cuba the telecoms/ISP monopoly, Etecsa, works with the political police to spy on dissidents, journalists and others. A common attack in Cuba is therefore SIM Swapping which is easy for them. It is ...
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3answers
138 views

Calling from mobile phone without using the cellular network

This has been in the news: https://www.wired.com/story/fcc-fines-wireless-companies-selling-users-location-data/ Is there a way to make calls without using cell towers? Also in this context: is it ...
2
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1answer
130 views

Is phone number verifications with SMS magic HTTP links less secure than OTP?

I want to verify phone number ownership with specially crafted and encrypted payload within an HTTP hyperlink callback through SMS as opposed to sending an SMS OTP code and writing it back in server ...
4
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1answer
192 views

How does a company check the password received from your phone keypad during a call? [duplicate]

I had to call customer service recently regarding my 401(k) and robo call in the beginning asked me to enter my social security number using the keypad followed by a # and then asked for my account ...
2
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1answer
606 views

Is inputting credit card numbers over a mobile phone secure?

I'm in the UK. In order to top up a pay-as-you-go SIM card, I had to first ring the mobile network to associate my bank card with the SIM before asking them to credit £10 to it (future top-ups don't ...
30
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6answers
6k views

Is revealing the phone number during OTP verification process considered a vulnerability?

One of the common way of implementing 2FA is using phone number Text message or Call with OTP. As I can see, usually web services show something like: OTP was sent to the number +*********34 Is it ...
38
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8answers
8k views

Why does my digital bank need my phone date and hour to be correct?

I'm not from Information Security or any IT related area. But I want to know if there is any security reason for my digital bank to demand my phone to be on "Automatic Date & Time"? For ...
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1answer
708 views

What is "Your Phone" in Windows 10 Advanced Firewall?

I have an Outbound Rule in my firewall called "Your Phone". Settings: All programs. In Customize Application Package Settings, it has "Apply to app package..." set with a long ...
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3answers
3k views

Is it possible to track someone using their mobile number in the UK?

This is something I've wondered for a while - is it theoretically possible to track someone using their phone number in the UK? It's a classic Hollywood trope and I'm wondering just how much truth ...
1
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1answer
153 views

Recycled phone numbers [closed]

I just wanted to ask because I am in a situation now, where I have been locked out of my Instagram due to my mobile phone provider deactivating my Simcard. I have contacted Instagram support sending ...
7
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4answers
1k views

Why do people use "burner phones" rather than Signal or similar solutions?

Why do people use burner phones rather than Signal or similar? I would imagine that if you are high value target the police or intelligence service would simply eavesdrop every phone call passing the ...
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59 views

Possible data leakage and traceability regarding mobile personal hotspots

The question Say, one may use a mobile phone's personal hotspot functionality to broadcast a message locally via the ESSID, like "Happy Birthday Lilian" or "Stand with Hong Kong". Assuming such ...
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0answers
48 views

How can you check if a phone number was recently moved? (To mitigate SIM swapping)

I know never to use phone number as a sole or backup authentication factor. But if a customer forgets their password, and I want to use information they know about their account alongside access to ...
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1answer
85 views

Can your phone get hacked just through your phone number? [closed]

If someone has got your phone number can they hack into your phone using just the phone number? Perhaps by sending an SMS?
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2answers
113 views

Call center recording my credit card info

I just made a new contract over the phone with my mobile phone provider and I needed to pay the activation fee. The lady told me that they could accept only credit cards and asked me for the full ...
4
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1answer
311 views

Why can't spoofed caller ID's be identified?

There are several posts here about how easy it is to spoof caller ID and that there is no way to detect it. I did find one post suggesting the calls to 1-800 numbers could not be spoofed. being ...
-1
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1answer
87 views

Are the locations text messages are sent from logged?

When you send a text message from a phone with a sim card, is there a log which records your location at the moment, or any other information? is it linked to the phone? to the sim card? to both?
1
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1answer
764 views

Could the thief who stole my phone access my pics?

So my phone was stolen but it has a PW. Could the thief reset it somehow & access to the gallery or my SD cards? Personal pics of me that i don't want leaked. Plus how do i even know they've ...
3
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1answer
157 views

What is the risk of having an old, Internet capable phone not used for Interned compromised? (not smartphone)

I'm talking about a class of old mobile phones that are not smartphones but are still (theoretically) Internet-capable, at least via 3G. Examples of such phones include Series 40 Nokia phones or the ...
-3
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1answer
258 views

When connecting to someones wifi without using it, can they see search history from the past?

We visited a friend who's working as a programmer. He told me to connect my phone to his wifi so he could send me a picture, however he didn't send it and I left my phone connected to his wifi for an ...
-2
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1answer
109 views

Does connecting your phone to wifi make it trackable by cellular connection?

can connecting to wifi reveal my cellular identity ? So what I mean is say hypothetically the powers that be wanted to tap your cellular phone and your home wifi (having the isp monitor all data). ...
-1
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1answer
172 views

Run Phone Apps in VM Anonymously and Security Risks of Virtualbox

Would it be possible to run phone apps that connect to the internet (eg. youtube, instagram, etc.) on an Android VM (or any sort of phone VM, doesn't need to be android) in VirtualBox within a host OS ...
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0answers
87 views

Phone number stolen. What to do?

It seems a friend of mine got his phone number stolen. Someone got access to his Facebook account (where they tried to post ad campaigns) and to his WhatsApp account. The Facebook security page said ...
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1answer
2k views

Is Android encryption secure? [duplicate]

As far as I know Android (Pie) is encrypted by default with some hardware-based password. But how secure is this encryption? I am not talking about password compromise, but if somebody gets my phone,...
3
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2answers
247 views

It's possible to make an account in mainstream social media without giving them my phone number or have a phone number that can identify you?

I'm learning about privacy and security and one of the tips everyone always talk about is compartmentalization, I'm trying to do this and get rid of my old profiles in social media (one of them have ...
12
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1answer
602 views

Canadian police mentioned a new line-trapping technique, but what is that?

The police in Canada are saying that there is a new technique ("line-trapping") where the scammers told a lady to call the police to confirm some fraudulent details, but when she hung up and called ...

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