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sms

22 articles

How Google phone number verification works, and whether you should turn it off
  • Android

“Your number is verified”: why Google regularly checks SIM cards on Android

Who sends regular hidden requests from your smartphone and why, how phone number verification works, and whether you should turn it off.

  • Stan Kaminsky

  • July 22, 2026

Scams in messengers: exposing the global scam-cartels exploiting everyday messages
  • messengers

The great messaging heist targeting your wallet

Kaspersky experts have found that a single fraudulent message in a messaging app leads to an average loss of $733. We break down new AI-powered messaging scam schemes, provide platform-specific statistics, and offer tips on how to protect yourself from digital fraudsters.

  • Kaspersky Team

  • June 1, 2026

What an SMS blaster is, and how to protect yourself from malicious SMS messages while traveling
  • sms

How to protect yourself from SMS blaster scams

Scammers have figured out how to send text messages that actually bypass cellular networks. How does illicit “SMS blasting” work, why does it matter for travelers, and how to stay safe.

  • Stan Kaminsky

  • July 11, 2025

How to protect your social media accounts from SIM swap attacks
  • Instagram

SIMulated giveaway on Instagram: the prize is your account!

A popular blogger’s Instagram account was hijacked using a SIM-swap attack, and deepfakes were generated to scam followers.

  • Kaspersky Team

  • April 28, 2025

Authentication codes from a service you don't have an account with
  • 2FA

When you get a login code for an account you don’t have

What to do if you receive a text with a two-factor authentication code from a service you’ve never registered for.

  • Kaspersky Team

  • October 9, 2024

What is SIM swapping, and how does it threaten business?
  • 2FA

What SIM swapping is, and why business should care

SIM swap fraud is back in vogue. We explain what it is, the danger it poses to organizations, and how to guard against such attacks.

  • Alanna Titterington

  • March 18, 2024

One-time passwords and 2FA codes — what to do if you receive one without requesting it
  • 2FA

What to do when you receive unsolicited messages containing login codes

One-time codes and two-factor authentication securely protect you from account theft. If you receive such a code or a request to enter it when you aren’t logging in, it may be an attempt to hack into your account.

  • Stan Kaminsky

  • February 8, 2024

Types of two-factor authentication
  • 2FA

Types of two-factor authentication: pros and cons

What two-factor authentication types are out there, and which ones should be preferred.

  • Alanna Titterington

  • June 19, 2023

What is two-factor authentication
  • 2FA

What is multi-factor authentication?

What multi-factor authentication is, why you should use it, and what “factors” there are.

  • Alanna Titterington

  • May 29, 2023

Despite their entry-level functionality, feature phones can be dangerous, too. Here’s why
  • mobile devices

Dangerous feature phones

Just like many other modern devices, seemingly “dumb” feature phones are much smarter than you might think. And this may be a problem.

  • Enoch Root

  • October 15, 2021

Smishing is phishing using text messages (SMS). What makes smishing more dangerous than typical e-mail phishing, and how you can protect yourself.
  • phishing

Smishing vs phishing — and how to stay safe

Scammers have gotten good at using SMS messages to get bank card information and online banking passwords.

  • Alexey Ferapontov

  • April 23, 2021

Some Android games ask for a bunch of unnecessary permissions. Here are five you shouldn’t give them.
  • gamers

Five permissions Android games do not need

You can refuse some permissions to greedy games, and they most definitely do not need these five.

  • Hugh Aver

  • August 4, 2020

The Ginp banking Trojan urges victims to open their banking apps with SMS and push notifications, then overlays these apps and steals banking credentials
  • Android

Ginp mobile Trojan fakes incoming SMS messages

In the hunt for your bank card info, the malware overlays apps with phishing pages and uses fake notifications to get you to open the apps.

  • Alexander Eremin

  • February 14, 2020

  • Android

The Faketoken Trojan sends out offensive texts

The ransomware app now uses infected devices to send SMS messages abroad on the victim’s dime.

  • Alexander Eremin

  • January 13, 2020

Apps that demand access to calls and SMS messaging without good reason are being kicked off Google Play. We explain what threats might arise
  • Android

New Google Play policy cuts both ways

Apps that demand access to calls and SMS messaging without good reason are being kicked off Google Play. We explain what threats might arise.

  • Leonid Grustniy

  • March 26, 2019

  • Android

The Rotexy Trojan: banker and blocker

We take a look at the Rotexy mobile Trojan: where it comes from, how it behaves, and how to get rid of it using a couple of regular SMS.

  • Leonid Grustniy

  • November 22, 2018

Never share verification codes
  • threats

Never share verification codes

Here’s how scammers try to phish for verification codes — and what may happen if you send them one.

  • Alex Perekalin

  • May 22, 2018

Why two-factor authentication via SMS is not enough
  • banking trojans

Why two-factor authentication is not enough

How messages with confirmation codes from banks are intercepted and what can you do to protect yourself.

  • Alex Perekalin

  • May 19, 2017

How banking Trojans bypass two-factor authentication
  • tips

How banking Trojans bypass two-factor authentication

Are you sure that one-time SMS passwords reliably protect your mobile bank? Think again! In this article we explain how Trojans fool two-factor authentication.

  • Alex Drozhzhin

  • March 11, 2016

  • Authentication

Twitter’s Foray into Authentication: SMS to Replace Passwords

Twitter debuts a grand but simple plan to replace passwords where your phone number is your username and an SMS-generated code is your password.

  • Brian Donohue

  • October 24, 2014

  • Facebook

What Facebook Needs In Order To Read Your SMS?

A new version of Facebook for Android drew some media attention because of the SMS reading permissions it requires, raising users’ concerns regarding privacy. Developers do have a reasonable explanation,

  • Serge Malenkovich

  • January 30, 2014

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