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Questions tagged [simcard]

A subscriber identity module, or SIM card, is a circuit used to store the IMSI number and associated key used as authentication on mobile telephony devices (for example mobile phones and tablets).

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Is Mobile ID secure? Certificates on SIM card (Mobile identity management)

In Switzerland Mobile ID is popular. It looks like it's international known as Mobile identity management. Mobile identity is a development of online authentication and digital signatures, where ...
2
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1answer
110 views

What happens if incorrect SIM card PUK entered 10 times?

I know that if incorrect SIM card PIN is entered three times, it is erased, so there is no longer any valid PIN, but user can set up new PIN with PUK. But when incorrect PUK is entered 10 times, it is ...
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2answers
152 views

Can websites uniquely identify users by the sim card used to access the website?

If I was to use a phone's data connection to access a website, and then pop that sim card into another phone to access the same website, could the website tell that I am the same user?
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Can mobile service providers use my iPhone's microphone to listen even when I'm not on a call?

So is this technically possible? Basically can the service provider somehow hack into my phone and use the microphone to hear the surrounding of my phone if they somehow have a backdoor/malicious code ...
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72 views

Does a SIM Card provide the cellular radio with temporary keys?

I understand that a SIM card is essentially a self contained computer, on which an algorithm is run that will receive a RAND from a network operator, and use it compute temporary keys (CK and IK) ...
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84 views

How can I test aspects of SIM cards? [closed]

In the past couple of months, I have had a bug in my SIM card. When data limit is reached, the SIM gives me free Internet at the speed of 10kbps. If I then switch my network type from 4g to 3g and ...
3
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1answer
115 views

Is Duo MFA vulnerable to a SIM swap exploit?

I'm looking into MFA options for a group of around 1000 people. Duo is intriguing, but I'm not sure I'm comfortable implementing something that incorporates text messaging (in contrast to something ...
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2answers
193 views

How do I protect myself against SIM hijacking/social engineering?

There are several posts like these: https://medium.com/@N/how-i-lost-my-50-000-twitter-username-24eb09e026dd https://motherboard.vice.com/en_us/article/5984zn/listen-to-sim-jacking-account-ransom-...
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2answers
393 views

Trip to China - safeguarding phone and laptop

I am going to China for a 2 week vacation in a month I will be taking a Google Pixel with a Verizon SIM and using it while there. I assume that if I don't use a local SIM, it would be difficult for ...
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0answers
107 views

How do third party providers remove the SIM lock on a mobile phone?

There are third party providers online who offer to remove the SIM lock on mobile phones, by emailing the unlock code. All they ask for is the phone's IMEI and the network provider's name. In one ...
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1answer
306 views

Calling someone with a broken SIM card? [closed]

My friend broke her (Australian Telstra pre-payed) SIM card in half just so she couldn't be contacted anymore. Now every time I call her it's saying "The number you have called is not connected. ...
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3answers
420 views

Tracking phone in country when SIM is not supported [closed]

Can the police track my cell phone if I left the country and went to another one and the SIM card is not supported by the country I went to?
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3answers
667 views

If you phone is seized, can you erase sim or stop them from cloning?

If your phone (for example, an iPhone) gets seized by the police, do they have sufficient technology to copy sim card (or any data) even if you cancel you provider and put phone in lost mode? If so, ...
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1answer
291 views

Is it possible to track a SIM card even if the cell phone is turned off?

I'm wondering if it is technically possible to track a SIM card inserted in a cell phone with sufficiently charge in the battery.
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1answer
393 views

When it is possible to locate/trace SMS sender?

I have read this question (which is closed) and already answered. Quoting the answer: There is no location transmitted within a normal SMS message (unless added by the author) so as the ...
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1answer
7k views

If my Android phone has a virus, can I change its SIM into a new phone to get a clean start, or can the SIM carry over the virus?

I am considering switching my SIM card into a spare Android phone I have, in light of two issues: 1) My issue here: Suspicious text received from my # but I did not send it - is there definitely a ...
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1answer
423 views

Can you compromise a phone with a SIM card?

If you are traveling abroad and buy a prepaid SIM card to use in that country in your phone, what kind of vulnerability are you exposing yourself to? Can a malicious SIM access information on my phone?...
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1answer
147 views

What happens if an attacker steals my sim card number?

The Sprint chat guy asked for my sim card number (ICCID) and I'm a little concerned about how sensitive it is. One possibility I can think of is being able to intercept SMS 2-factor Auth.
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1answer
187 views

What are the physical security features that prevent the cryptographic data on a SIM card being read?

In his excellent answer to "How does a SIM card prevent cloning?", user Lie Ryan explains that SIM cards have their critical data stored in "tamper proof housing", protected by "physical security ...
3
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1answer
255 views

Can SIM card be locked to the specific equipment?

I'm curious if SIM card can be "personalized" to operate only in the specified mobile equipment in addition to usual PIN security. So the SIM extracted from "legitimate" phone and placed into ...
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3answers
2k views

How can I protect myself from someone taking over my mobile phone number?

I don't know much about security and don't know if these things are possible or not. Last night I received a text message stating "Please use ****** to authenticate your phone number in the DIGITS ...
4
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1answer
8k views

What software can be used to read data from smart cards? [closed]

I have recently got this smart card reader. In the description it says that it can be used to read data from fidelity smart cards, library cards, etc. The technical card compatibility support is as ...
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1answer
140 views

911 Authentication and Encryption

When I talk over 3G without a SIM, for which the only example I see is 911 emergency calling, is any encryption used? In other words, can a 3G eavesdropper understand any content of my 911 call? I ...
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0answers
125 views

SIM cards Trace to buyer [closed]

Hi I was wondering if a SIM card can be traced to the person you purchased it. Let's say I bought a SIM card and used it to make it look like a friend was sending messages could that card be traced ...
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0answers
1k views

Install SSL certificate from SIM card [closed]

Are mobile network providers able to store their own SSL certificate on SIM cards, and auto-import this certificate into trust store on mobile phones (Android/iOS)? I know that SIM cards can store ...
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0answers
163 views

Does old SIM-cards have the same security as new one?

As I am using an old (10-15 years) SIM-card, I was asking myself if the hardware and software on the sim-card is equivalent to the newer sim-cards. Are the old-sim-cards (10-15years) the same as the ...
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0answers
211 views

Shellcode Injection/Poisoning on Mobile Networks[GSM/LTE/CDMA-varaints]?

In the previous question(How do APN hacks work?) I have enquired about APN hacks but after reseaching more about cellular networks. I wonder has anybody attempted Remote-code execution/poisoning,etc ...
4
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1answer
176 views

I have a conceptual idea for a network that could obfuscate the geolocation of a mobile station. I would appreciate short, critical feedback

I am a student in network engineering, and I have a technical essay due on November 18th. I can choose the topic of the essay myself. I have a conceptual idea of a network that could help obfuscate ...
4
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2answers
27k views

Can the police track my phone even if I remove the SIM card?

If the Police have your mobile phone number then I understand they can track your mobile phone. Now, I understand the mobile phone number is linked to the sim card but if you simply change the sim ...
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1answer
2k views

Protection from Sim Card Cloning [closed]

My friend had a problem with her phone. Somehow it was acting weird, I knew someone was hacking her. I tried to help her by doing a PIN Lock and a factory reset of her android phone (version 6.0), but ...
0
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1answer
2k views

Can location apps locate a lost phone if someone switches out the SIM card?

I lost my T-mobile Galaxy S7 somewhere between the front seat of my car in the parking lot at the grocery store and the first few aisles inside the store. (None of us remember exactly if I actually ...
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0answers
104 views

What information about a user can wireless carriers access?

What is the maximum amount of imformatiom about a user and the user's phone that can be obtained by a wireless carrier on a GSM network? Here is a list of the things I know, but are there more? IMEI, ...
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3answers
15k views

Can a SIM card propagate malware?

Is it possible that malware can infect a SIM card? What will happen when I insert the SIM card in another phone?
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3answers
2k views

Why is my phone connection secure without a password when WiFi is not even with a password?

When I talk on the phone or send text messages, I never need to type a userid and password. But when I use WiFi I need to use a password. How is the phone connection secured without a password, and ...
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1answer
233 views

Mobile number tracking

Is there any way we can track our mobile when it is lost? I have done a google search on the same and found that we have websites which give us the details of where the SIM was purchased & ...
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2answers
13k views

Risks of lending/borrowing a SIM card temporarily?

Suppose someone asks to borrow my SIM card so they can e.g. check if their phone is unlocked. I watch them use the phone to check what they need to check, and afterwards take my SIM card back. Is ...
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1answer
90 views

Bought used computer with working GSM card [closed]

I recently bought a used computer from a company. They are buying lots of computers from big companies and they refurbish them for resale. Today I discovered that my computer has an installed SIM card....
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2answers
838 views

What happens when you SIM-unlock a cellphone

In the UK the process for unlocking a mobile phone (cellphone) usually involves either buying an "unlock code" from ebay which you then have to put into the phone to unlock it, or taking the phone to ...
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1answer
274 views

Can a SIM card in a different phone be tracked?

If I have lost my phone, reported it, but I had the SIM, would the SIM be tracked back to me if I got a new phone and used this SIM?
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3answers
3k views

Security of data stored on sim cards

What kind of data can be stored on sim cards and reactivated on another device? Is it safer to store data on the device or the sim card?
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3answers
2k views

What footprint iOS or Android App leaves? and how to change it

I've read some place that each phone and/or sim leaves some kind of footprints when it uses a social app (Google, Instagram etc.). I would like to stay anonymous or at least blend in with the crowd. ...
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2answers
12k views

How to block a cloned SIM card? [closed]

If someone manages to get access to my iPhone's SIM card (I left the phone at a repair shop for a few days and forgot to take the SIM card out). Now, the repair people at that shop were acting all ...
4
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1answer
238 views

Way to keep Google from knowing the SIM card I am using on Android

We see that the the details of the Telecom operator along with other details are available to Google for the SIM card that we are using on an Android Phone. Is there any way that can be applied or ...
3
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3answers
2k views

Is it safe returning or giving away a sim card you already used?

I bought a prepaid sim card and used it on my android, but i had a problem using it and would like to return it. Is it safe to do so? I'm wondering if it could now contain my personal information ...
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2answers
1k views

Mobile Phone Client -> Server Authentication based on device

I have a mobile application (Android, iOS) and a server, which handles requests from the application. It is easy to perform standard authentication using SSL, password and random token to ...
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1answer
185 views

Can the location of a cellphone be pin-pointed?

If a person uses a SIM card that is pre-rica registered (meaning it is not registered on his name but the supplier), can you pin-point where a particular message or call was made from? For example: ...
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2answers
125 views

Is it possible for a website, by knowing the public IP only, to detect the exact smartphone device I'm using?

If with the same smartphone device I surf to one website (each time with a different IP, different SIM card and no saved cookies or cache), is it possile to detect that I'm using the same device? If ...
2
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1answer
946 views

Does the carrier network autheticates itself to the SIM card?

From my understanding this is how SIM authentication works: When the mobile device starts up it obtains IMSI from the SIM card and send it to the operator network Operator network finds the Ki(128 ...
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3answers
4k views

A security concern I dicovered with simcard devices

Well, it all started when I wanted to take the sim card out of my tablet and I was about to shut it down so that I could take the simcard out. But then a thought raced through my mind, "What if I take ...
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1answer
2k views

How do I get Kc from my SIM card?

Since listening to a few Defcon talks on SIM cards and, more recently, the NSA Playset, I've become interested in GSM. This page gives a fairly good tutorial on getting Kraken set up, but apparently ...