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NYC Telecom Raid: What's Up with Those Weird SIM Banks?

https://tedium.co/2025/09/23/secret-service-raid-sim-bank-telecom-hardware/
81•coloneltcb•2h ago

Comments

leakycap•1h ago
Such a cool write-up, I enjoyed the screenshots of the admin interfaces ... which look exactly as bad as I'd hoped

Sad to see Mobile-X MVNO as the preferred SIM in the photos shown, but I wonder if an MVNO has local-level data to detect a situation like this when hundreds of phones are in one area and don't move. Postpaid carriers running their own network might easily connect the dots between SIM/accounts/phone towers... but the piggyback nature of MVNO network management probably makes even detecting this behavior even harder.

rr808•36m ago
Damn Mobile-X I hadn't heard of them but looks like a good deal. Maybe this is actually a marketing exercise?
mike_d•14m ago
> I wonder if an MVNO has local-level data to detect a situation like this when hundreds of phones are in one area and don't move

MVNOs don't care because they collect the profit without having to deal with any of the network issues. The carriers in turn only care when it impacts performance for legitimate customers, as they also see a piece of the pie.

Scoundreller•1h ago
Maybe weird hardware, but easily available on aliexpress. Y’all need to explore more. Appears to be scrubbed off now but used to be more available.

Tbh, contraptions like this have a long history for gray-market VoIP call termination, but usually in countries where governments charge a lot for incoming international calls as means of fund-raising (or inefficient telecoms) but domestic rates are low.

Merge with https://news.ycombinator.com/item?id=45353925 ?

mac-attack•1h ago
At what point does an article shift from giving insights -> giving a step by step to start your own spam farm?

Praising the device and stating how cool it is? Highlighting how inexpensive it is? Screenshots of how it works? Saying where you can buy it from?

The line is blurry but this article has all of that. Here's to responsible journalism and being inundated with more spam on my phone so that a newsletter gets more clicks.

gruez•1h ago
The author probably turned up everything in the article by searching on google so it's probably not helping anyone unless they want to turn to the dark side right this second
SchemaLoad•59m ago
I doubt a random blog post is enabling this. If you are at the point of dropping thousands of dollars on a spam farm you've got the ability to find this stuff yourself. If anything it's highlighting how this stuff works to the average person.

This problem isn't going to be solved by making information about the devices more obscure. It's going to be solved by technical preventions and legal action against the senders.

neuroelectron•1h ago
This guy claims that it's not that suspicious and not a state-backed operation.

https://x.com/ErrataRob/status/1970586083374112784

is_true•1h ago
I thought it was someone running a mobile ip proxy
dilyevsky•40m ago
"residential" proxies, ad clickbots, instagram/twitter bots - lots of "legit" use-cases these days
AnotherGoodName•1h ago
Can’t read it since I don’t have a login there but i’m guessing they buy sims from all over the country and sms on matching prefixes since people will assume a local number is less likely to be spam.

This explains using such a bank. You want to cover as many prefixes as possible and you can’t match area codes with traditional sms services.

motoboi•57m ago
You don't need a login to read a single tweet.
AnotherGoodName•52m ago
Thanks! I was assuming it was a chain with more details than i saw there.
edoceo•43m ago
Twitter is inconsistent for me. From the mobile (FF, not authenticated) it's blocked but from desktop (FF, not authenticated) is visible.
jghn•56m ago
You can also see his takes on bsky [1] or h blog he posted there [2]

[1] https://bsky.app/profile/erratarob.bsky.social [2] https://cybersect.substack.com/p/that-secret-service-sim-far...

AnotherGoodName•49m ago
The second link there is much more meaningful.

I actually did see the tweet in full it turns out. It's just that there's not much content so i figured "oh it's one of those twitter thread chains i can't read".

perching_aix•29m ago
These days the way to go is social media proxies. A popular one is xcancel. Just replace the x in the domain with xcancel and you'll land on a proxy site (somebody's Nitter instance to be specific): https://xcancel.com/ErrataRob/status/1970586083374112784

Still not gonna help if you have cookies disabled because of the rate limiting, but hey.

dmd•1m ago
I love how spammers do that- it works out great for me. I no longer live in my phones area code. I block the entire area code, which catches a huge amount of spam calls.
mike_d•23m ago
I am very familiar with the hardware being used in that operation and Rob is 100% correct.

Someone used an online SMS service to send threatening messages to a member of the Gleichschaltung squad, and the secret service traced the SIM card back to one of these rented apartments. The reason it was linked to a "Chinese state sponsored blah blah blah" is because most Chinese criminal operations in the US have some indirect benefit to the Chinese government, which is why they are allowed to operate.

You could use this hardware to launch some sort of a flooding attack, but given the density all you are going to knock out is the one cell site all your devices are talking to. If China wanted to knock out cell service around the UN they would use the hundreds of thousands of backdoored Android phones in New York to launch a more distributed attack.

daft_pink•1h ago
“One has to wonder if the rise of eSIMs is designed to make these products obsolete.“ or significantly reduce their labor costs.

I think this explains why the spam texts I receive never show up as an iMessage or rcs. This thing-a-ma-hugger doesn’t support it.

SchemaLoad•1h ago
This seems like a pretty far fetched idea that phone manufacturers are pushing for esim to enable spammers to spam easier, rather than to free up space in phones for a bigger battery.
mike_d•13m ago
> phone manufacturers are pushing for esim [...] rather than to free up space in phones for a bigger battery.

It is being pushed by the carriers because retail locations are their biggest overhead expense, for what is basically a place to go pick up a SIM card.

crtasm•59m ago
I'm not sure it's viable to run large amounts of iMessage accounts, e.g. looking at https://bluebubbles.app/faq/ it needs a running MacOS machine/VM to work.
crazygringo•1h ago
For context, the original story from earlier today:

Cache of devices capable of crashing cell network is found in NYC (263 points, 251 comments)

https://news.ycombinator.com/item?id=45345514

1oooqooq•26m ago
oh that's why google have been silently banning all corporations using gvoice unless they email support for each number to be manually checked for compliance.

it's been a few interesting couple months at work, as google being google there was never an announcement or anything.

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