Learn how phones actually work.
MobDojo teaches mobile security hands-on: how phones, SIM cards and cell networks work, Android and iPhone security, SIM swapping and scams, mobile forensics, malware, exploits and data recovery. 225 short lessons across 9 tracks, each with labs on a simulated phone in your browser. The first course of every track is free.
Browse all lessons · Grade your phone's security · Quick answers
Track 1: Mobile Fundamentals
Start from zero: what's inside, how it talks to towers, how apps are kept apart. Every module runs on a simulated phone, right in your browser.
- Inside a Phone: What's physically inside the slab in your pocket.
- SIMs & Identity: The numbers that identify you and your phone to the network.
- Cellular Networks: How a phone finds a tower and keeps a call alive on the move.
- Wi-Fi & Bluetooth: The short-range radios, and how to use them safely.
- Mobile Operating Systems: How Android and iOS keep apps in their lanes.
Track 2: Mobile Networking
Follow your data from the phone to the server and back: packets, DNS, encryption, and exactly who can see what along the way.
- How Apps Talk: Packets, addresses, DNS and ports: how data finds its way.
- Encryption in Transit: How HTTPS keeps your data private on its way to the server.
- Watching Traffic: What others on a network can see, and how to check your own apps.
- Mobile Data Under the Hood: How a phone gets online over cellular, shares it, and stays reachable.
- Network Privacy: VPNs, encrypted DNS, Private Relay and trackers, minus the hype.
Track 3: Android App Security
How apps are built, signed and boxed in, what their permissions really allow, and how to spot and remove a bad one. Hands-on labs on a simulated phone.
- Inside an APK: Open an Android app and see what it's made of and who signed it.
- Permissions in Depth: How Android guards your data, and which kinds of access are risky.
- Components & Intents: See how apps' parts talk to each other, and which doors stay locked.
- Storing Data Safely: Where apps keep files, keys and secrets, and how data leaks out.
- Spotting Bad Apps: Recognize, avoid and remove harmful apps before they do damage.
Track 4: iOS Internals
How iOS is built and locked down, the privacy controls you actually have, keeping your Apple Account safe, and spotting scams, trackers and spyware. Hands-on labs on a simulated phone.
- Inside iOS: How an iPhone is built, signed, sandboxed and kept up to date.
- Locks & Encryption: How an iPhone guards your data with keys, faces and fingerprints.
- iPhone Privacy Controls: Take charge of what apps, ads and iOS itself learn about you.
- iCloud & Your Apple Account: Protect the account, backups and passwords behind your iPhone.
- Staying Safe on iPhone: Spot scams, rogue profiles, trackers and spyware on an iPhone.
Track 5: Mobile Forensics
How investigators preserve a phone, where the evidence lives, how timelines are built, what the cloud holds, and how to report it honestly. Hands-on labs on a simulated phone.
- Forensics Foundations: How phone evidence is found, protected and collected the right way.
- Where the Evidence Lives: Find the databases, photos and places a phone quietly remembers.
- Timelines & Analysis: Decode timestamps and build timelines that hold up.
- Cloud & Account Evidence: Learn what the cloud holds, how it's reached, and where it stops.
- Reporting & Ethics: Prove evidence is intact, report it plainly and stay within scope.
Track 6: Mobile Malware
What mobile malware is, how analysts take an app apart, how it talks to its servers, real documented cases, and how it gets detected and stopped. Hands-on labs on a simulated phone.
- Malware Basics: What mobile malware is, how it pays, and who it really targets.
- Inside a Malicious App: Take a suspicious app apart, watch it run, and share what you find.
- Cutting Off Malware: See what defenders spot on the network, and how malware is cut off.
- Real-World Cases: Four documented mobile attacks, from mass smishing to zero-click.
- Detection & Defense: See how platforms, companies and researchers find and stop threats.
Track 7: Exploits, Tools & Data Recovery
How bugs become attacks and get patched, the defenses that stop them, the phone-unlocking and forensic tool industry, and the truth about deleted data and factory resets. Hands-on labs on a simulated phone.
- How Bugs Become Attacks: How flaws get found, named, scored, exploited and finally patched.
- Bug Classes & Mitigations: The kinds of bugs attackers use and the defenses that stop them.
- Passcode Bypass & the Unlocking Industry: Who unlocks phones, how the law treats it, and how phones resist.
- The Forensic Tool Landscape: Know the forensic tools, how they are tested and where they go wrong.
- Deleted vs Reset: Myths & Reality: What delete and reset really erase, and where your copies survive.
Track 8: Computer Basics
For anyone who feels lost on a computer: turning it on, the mouse and keyboard, windows, files and folders, the internet and email. Practice on a pretend computer where nothing can break. The whole track is free.
- Meet Your Computer: The parts, the buttons and the plugs, explained in plain words.
- Mouse, Touchpad & Keyboard: Click, drag, scroll and type with calm, steady confidence.
- Windows & the Desktop: Find apps, handle windows and calmly fix a frozen program.
- Files & Folders: Save, find, move and delete your files without the worry.
- The Internet & Email: Browse the web, find the right site and send your first email.
Track 9: Staying Safe Online
Strong passwords, fake virus pop-ups, phishing emails, real and fake download buttons, updates, and the backup that saves the day. Practice on a pretend computer where nothing can go wrong.
- Passwords & Sign-ins: Make strong passwords, stop reusing them and lock your accounts.
- Scams & Fake Pop-ups: Spot fake warnings, fake shops and fake buttons, and know what to do.
- Email & Message Tricks: Spot fake emails and texts, check links and report scams.
- Updates & Antivirus: Keep your computer updated, protected and safe from fake warnings.
- Backups & Bad Days: Keep a spare copy of your files and know what to do on a bad day.