You've probably heard that 5G is everywhere and that 6G is already in development in some lab, but there's a detail that often goes unnoticed: at the heart of our smartphones, a ghost of the past called 2G still lingers . Although it may seem like a harmless technology because we no longer use it for browsing, it's still active and, unfortunately, has become a favorite backdoor for cybercriminals.
The problem isn't that 2G is slow, but that it's dangerously outdated . It was designed in an era when today's risks didn't even exist, so it lacks the security layers we now consider essential. That's why both cybersecurity experts and Google itself recommend that we anticipate the official shutdown and manually cut off 2G access to avoid unnecessary surprises.
The real danger: Fake antennas and SMS blasters
To understand why we should be concerned, we need to talk about so-called Stingrays or SMS Blasters . Basically, these are fake base stations that scammers can buy online without needing to be computer experts. These devices simulate a legitimate 4G or 5G antenna, but as soon as your phone tries to connect, the device degrades the signal and forces the phone to revert to the 2G protocol.
Once your device has fallen into the trap and is connected to that fake 2G network, the attacker has free rein. Since 2G lacks mutual authentication (meaning the phone doesn't verify if the antenna is who it claims to be) and its encryption is incredibly easy to break with current computing power, criminals can inject fraudulent SMS messages . These messages bypass your carrier's spam filters and appear to come from your bank or a courier service, facilitating data theft or the installation of malware that compromises Android security.
How to say goodbye to 2G on your Android phone
The good news is that if you have an Android device, you can close this security gap. Depending on your system version and phone brand, you have two main ways to do so.
Simple method using Settings
If you have Android 12 or a later version , Google has made things much easier by integrating a direct switch. Just follow these steps: go to your device settings, then to Network & Internet (or Connections) , access the Mobile network or SIM section, and find the Allow 2G option to disable it. It's a quick process that won't prevent you from making emergency calls, but it does reduce your security burden.
Advanced method using hidden code
If the option doesn't appear in your settings or you have an older model, there's a phone dialer trick that usually works on most Android devices. Open the phone app and dial *#*#4636#*#* . This will open a secret menu called 'Test'. Go to 'Phone information' and look for the 'Set preferred network type' dropdown menu . Here you can choose combinations that exclude 2G:
- If you want 5G and 4G: select NR/LTE.
- If you prefer to keep 3G for coverage: select NR/LTE/WCDMA.
Keep in mind that on iPhones, unfortunately, it is not possible to manually block 2G , as Apple does not offer a similar option to the end user.
Does disabling 2G save battery?
Many people think that by disabling 2G, the phone will stop searching for older frequencies and, therefore, the battery will last longer. While it's true you might save a few milliamps in very specific situations , it's not something you'll notice in everyday use. Don't get your hopes up; if you want your battery to last longer, it's better to lower the screen brightness or manage background apps . The real reason to disable 2G is, without a doubt, security.
The global blackout timeline and its impact on the IoT
2G won't disappear overnight, but it already has an expiration date. In many countries, such as the United States, Switzerland, and Australia, these networks are already history. In the European Union, the process is gradual, and it is predicted that by 2033 virtually the entire continent will have shut down its 2G and 3G networks.
In Spain, the situation is unique. Operators like Movistar, Orange, and Vodafone are phasing out 3G first, but 2G is holding out longer due to IoT (Internet of Things) devices . There are thousands of alarms, payment terminals, and smart meters that only work with 2G. Furthermore, European regulations require its maintenance for the eCall emergency system in vehicles. However, it is estimated that the switch-off will be complete by the end of the decade or the beginning of 2030.
This poses a risk to companies with older hardware. Many devices marketed as 4G actually use 2G for voice calls because they don't support VoLTE. If 2G disappears, these devices will be left without service. The solution is to migrate to more efficient and secure technologies like NB-IoT or LTE-M , which consume very little power and have much better coverage in basements or rural areas.
The transition to more modern networks is inevitable and necessary to free up space in the radio spectrum and improve overall speed. Although the complete shutdown process will take years, taking the initiative to block 2G on your smartphone today is the best defense against fake base stations and advanced phishing, ensuring your connection is always robust and protected against outdated protocols.
