Hello everyone. I have a sim card in my name. I insert it into a router to give internet to my house.
So my computer has internet through that router that receives internet from the sim card.
Is there a possibility that an attacker or malicious actor could know personal data or the owner of the sim card? Thank you.
They would need to compromise the ISP, the cellular network or the router.
Keep the router up to date. Make sure the router firewall is enabled and blocks incoming connections. Make sure you use a good password for Wifi networks and are using either WPA2 or WPA3, prefereably WPA3 if your devices support it. This would prevent most attack vectors that target you specifically.
I’m curious about this. I have some forestland in a rural area and wondering about the best way to get internet in my van when I go camping.
Is a router with SIM card just as secure as a regular router? Or is Starlink a better option?
Hi Doctor, how are you?
Suppose I have opened a malicious file on my computer that is wired to the router that gets intern from the sim card.
Is it possible to obtain personal information from the sim?
Would the security measures be the ones you mentioned before?
Thank you.
I think the method I outlined can be a fantastic idea, as long as there is good phone coverage in your area.
I’m curious about why people don’t just use their hotspot?
I do really want to know the use cases.
I don’t actually have a doctorate, I just generated the username and sort of went along with the first thing that happened to come up.
The router can’t effectively defend against the laptop if it has access to the main network. Putting it on a guest network can help protect the router but the information on the laptop is likely more valuable.
Keeping the system up to date and avoiding suspicious links is still one of the best ways to avoid getting compromised.
My understanding is that the information on most modern SIM cards is mostly useless without access to the ISP’s internal database.
I would say it depends on which government you are more concerned about. US or Local.
Starlink is at the end of the day an ISP. They seem to answer to similar law as most cellular networks.
But I’d probably prefer Starlink if I knew there was spotty cellular coverage.
In my country at least. Costs.
A “data sim” costs a fraction of a “phone sim” the only difference being whether they can send sms texts or call.
But you could just put the data sim in the phone if that functionality wasn’t important.
Cool to know. 
I have a lot of data on my phone for the hotspot. Even when I have used it up, it doesn’t really get slowed down any so pretty much unlimited.
I’m so accustomed to using my phone for everything so that’s why I was curious. 
Hi Doc. How are you? Thank you for your answer.
In my case I want to have a network totally apart from my main home network.
That’s why I want to have another network with the SIM card. I like to do security tests and I want to do them all on the SIM network.
The laptop is exclusively for it, so I don’t have any important data inside. But I want to know if they can get any personal information from the SIM if the laptop gets infected with malware.
Thank you very much.
I don’t know for certain, but I don’t expect it to have anything on it useful to anyone other than the ISP. Maybe enough to clone it. The router might have login information relevant to the ISP account, usually in APN settings.
I wouldn’t count on it stopping the police from finding you.
But a criminal would need to have compromised a far more valuable target to make much use of it.
I’ve only ever done basic security testing, like breaking into my own Wifi network. But based on my experience security testing shouldn’t be putting your laptop at risk to begin with.
Thanks for your response. If there is a colleague who can provide some more information it would be very useful.
Maybe with everyone’s help we can settle this matter.
Thank you.
Hi everyone. Can anyone provide more information? Thank you.