How I maintain my cellphone protected towards stingrays (not that sort)

Abstract

Stingrays trick iPhones and Android units alike into sharing delicate data, significantly your IMSI quantity, which can be utilized for identification and monitoring.
Android has elective protections like disabling 2G and blocking unencrypted communications, however assist will depend on the precise cellphone you’ve, and which model of Android it is working.
iPhones have fewer defenses towards stingrays until you allow Lockdown Mode.

It has been over a decade because the begin of the Snowden leaks, which uncovered mass surveillance applications within the US. I point out this as a result of one of many smaller issues Snowden (and others) drew consideration to is using “stingrays,” also called IMSI catchers. Police, army, and intelligence businesses have sometimes used these to intercept information on cellphone customers with out their data — and criminals might now be making use of the know-how as properly.

All this makes it sensible to study a bit of bit about how stingrays work, and how one can defend your iPhone or Android gadget towards them, since nobody has an inherent proper to intercept your cellphone site visitors and not using a warrant. What’s fascinating is that in the meanwhile, Android 16 appears to supply a bonus on this space — although Apple will presumably catch up in the end.

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What’s a stingray, and the way does it work?

Preying on hidden vulnerabilities

Unsplash

The very first thing to level out is that legally talking, the time period “stingray” derives from a selected product — the StingRay, made by the Harris Company. It is quite a bit simpler to speak about stingrays than IMSI catchers, nonetheless, so the product turned a catch-all time period, a lot as some individuals confer with all facial tissues as Kleenex.

Functionally, stingrays trick your cellphone into connecting to them by pretending to be a close-by mobile tower. As soon as that occurs, it is doable to extract delicate information, together with your cellphone’s IMSI (Worldwide Cell Subscriber Identification) quantity, which can be utilized to determine and observe you. Stingrays might also be used to gather metadata, and in some instances, the precise content material of communications. Extra hardly ever, stingrays are used as offensive weapons, say to conduct denial of service (DoS) assaults.

Any mobile gadget inside vary of a stingray is liable to connecting to it, so your information could also be snatched up even whenever you aren’t an meant goal.

This may occasionally all sound like one thing your cellphone ought to be capable of defend towards, however stingrays can dupe your cellphone into utilizing a protocol with weaker safety, as an example by briefly switching you from 5G to 2G, which most carriers have deserted. Usually, computerized hopping is an efficient factor — it retains you related as you progress between areas with completely different protection. But when it is not dealt with correctly, it will probably grow to be an assault vector.

One of many terrifying issues about stingrays is that they are non-discriminatory. That’s, any mobile gadget inside vary of a stingray is liable to connecting to it, so your information could also be snatched up even whenever you aren’t an meant goal. This and different points have drawn the eye of scrutiny of teams just like the American Civil Liberties Union and the Digital Frontier Basis. There’s extra to clarify than I can probably go into right here, so I encourage you to study extra, significantly when you’re planning to affix a politically delicate protest.

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defend an Android gadget towards stingrays

The most effective safety is reserved for the newest units

An important factor is preserving Android up-to-date, and being conscious of its anti-stingray choices. In the event you’ve obtained Android 12 or later, you may disable 2G connectivity utterly by going to Settings -> Community & Web -> SIMs, selecting your SIM, then toggling off Enable 2G. Don’t be concerned — most cellphone carriers have switched completely to 4G and 5G, so you will not discover any calls, texts, or information interrupted. Certainly even 3G networks are being deprecated, since they’re too gradual to maintain up with the calls for of recent apps.

Android 14 expands this safety with an choice to dam “null ciphers,” i.e. unencrypted communications. There isn’t any professional purpose to be utilizing unencrypted information anymore, given how harmful the web may be, so disabling null ciphers is an apparent means of mitigating the specter of stingray assaults. Android 15 takes yet one more step ahead, enabling a notification at any time when a community asks for distinctive gadget identifiers, or forces weaker safety.

The one zero-risk choice, although, is to dam mobile exercise totally.

Android 16 features a Cell community safety web page to centralize issues, which it is best to be capable of attain through Settings -> Safety & privateness -> Security Heart. There is a huge catch, nonetheless — it solely seems on units with specific modems, and model 3.0 or later of Android’s IRadio {hardware} abstraction layer (HAL). You are unlikely to see the web page in any respect, even when you personal one thing as latest as a Pixel 9. You might have to attend in your subsequent cellphone improve to check this out.

The excellent news right here is that many Android telephones ought to assist disabling 2G, at the least. It is simply much less handy and safe than what the newest and biggest Android 16 units are able to.

In the event you’re in a high-risk state of affairs, there are apps that may doubtlessly warn you about stingrays, comparable to SnoopSnitch. The one zero-risk choice, although, is to dam mobile exercise totally, and that applies to each iPhones and Android units.

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defend an iPhone towards stingrays

Time to play catch-up

Enabling Lockdown Mode on an iPhone. — Apple

Apple

iPhones are lagging behind in terms of stingray safety, however they don’t seem to be defenseless. You possibly can, for instance, go to Settings -> Mobile -> Mobile Information Choices -> Voice & Information and select both 5G On or LTE. The 5G Auto choice does enhance battery life, however will increase your probabilities of being kicked all the way down to a much less safe community.

In the event you use that step, you might also need to go to Settings -> Mobile -> Community Choice and disable Automated, however be warned — this selection can create havoc. It’s possible you’ll end up unable to roam home networks, and you will have to manually choose a provider whenever you journey overseas. It is most likely not well worth the problem.

That is partly as a result of in iOS 16 or later, Apple provides a characteristic known as Lockdown Mode. This permits a large set of safety measures, principally meant for journalists, dissidents, and others liable to being focused by authoritarian regimes or overseas governments. In the event you’re actually anxious about stingrays, although, Lockdown Mode forcibly disables 2G, and limits how your iPhone can work together with the skin world. It is so draconian that it is best to keep away from it until completely vital — even many web sites and Messages attachments will not work.

It isn’t clear but whether or not iOS 26, coming fall 2025, will supply any enhancements to stingray safety. I am anticipating Apple to meet up with Android in some unspecified time in the future, nonetheless, because the firm prides itself on safety and privateness.