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Every profession or hobby develops its own very specific lingo for dealing with complicated ideas in a simple way, and the Android world is no different.

If you’ve googled a problem with your Android smartphone or tablet and come across words or phrases that you didn’t understand, like rooted, flash a custom ROM, unlock the SIM, or anything like that, then this article is for you.

Android pros probably already know what these mean, so this is a guide for the beginner who wants to learn about all the words behind our Android nerdiness.

What Is Rooting?

First of all, the big question: What is rooting? What does it mean to have a rooted or unrooted device?

By default, no Android device ships rooted Why Doesn't Android Come Rooted? Why Doesn't Android Come Rooted? Rooting your Android phone is a rite of passage. It unlocks the functionality that separates Android from iOS and opens a realm of almost infinite customization. Replacing the entire operating system is possible on a... Read More . If you’ve just bought and Android device and done nothing to it, the answer is that it is not rooted. You do not have root access.

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Manufacturers do this because granting everyone root access (by shipping rooted phones) would result in a lot of problems. Having root access allows you to access files on your device that — if removed or edited in the wrong way — could break your device. Uh oh. So, that’s generally not something your manufacturer wants you to have access to.

But, rooting your device allows you to make a lot of really cool changes if you know what you’re doing, so lots of people choose to root their devices anyway.

How you root your device is different for every single model. For some devices, this can prove to be a difficult process that involves circumventing safety precautions set by the manufacturer. For others, it can be as simple as plugging your phone into your computer and pressing a button. You can always check out the XDA-Developers forums for instructions for your specific device.

Once your device is rooted, you won’t notice any major changes immediately. The fun comes in what you can do after your device is rooted. You can then make use of apps that require root access, flash custom ROMs, tweak certain aspects of your phone, and more — which we’ll examine more later.

For example, you can remove some bloatware while unrooted How to Remove Bloatware on Android Without Rooting How to Remove Bloatware on Android Without Rooting Did your phone come with a bunch of crappy apps pre-installed? Let us show you how to get rid of them the easy way. Read More , but to really get rid of it, you need to root your device and use Titanium Backup.

What Is Jailbreaking?

Ah, wrong territory, my friend. This is an article about Android lingo, and jailbreaking is for iPhones and iPads Should You Still Jailbreak Your iPhone in 2015? Should You Still Jailbreak Your iPhone in 2015? It used to be that if you wanted advanced functionality on your iPhone, you'd jailbreak it. But is it really worth it at this stage in the game? Read More . Jailbreaking is essentially the iOS equivalent of rooting on Android — it gives you access to sensitive parts of your phone, allowing you to customize (or break!) your phone.

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Since Apple really doesn’t want you jailbreaking your phone, the process is a cat and mouse game and can leave your phone open to security vulnerabilities that get patched in newer versions of iOS.

Oh, and of course, rooting or jailbreaking your device is completely legal Is It Illegal To Root Your Android or Jailbreak Your iPhone? Is It Illegal To Root Your Android or Jailbreak Your iPhone? Whether you're rooting an Android phones or jailbreaking an iPhone, you're removing the restrictions the manufacturer or cellular carrier placed on the device you own – but is it legal? Read More . But you can learn more about jailbreaking iPhones elsewhere — let’s get back to Android.

What Is Unlocking?

Unlocking is a confusing term because there are multiple things you could unlock.

Unlocking the Network/SIM is the first. A device that is network/SIM locked is a generally one that was bought from a carrier or for a specific carrier at a subsidized price. The carrier then puts a lock on that phone so that you can only use it with them.

But, if you pay off the phone and want to switch carriers, the carrier is legally required to give you the unlock code (at least in the US and the EU), so you simply contact your carrier for the code.

Sometimes, unlocking your device gets more complicated than that, so we have a guide to SIM unlocking How to SIM Unlock Your Android Smartphone or Tablet How to SIM Unlock Your Android Smartphone or Tablet If you're switching carriers or going abroad, you'll need to SIM unlock your device. Here's how. Read More . Other times, you buy your phone unsubsidized and unlocked, meaning it can already be used with any carrier.

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Unlocking the bootloader is the other kind of unlocking. This is done on the path to rooting and is generally one of the first steps. Manufacturers generally lock the bootloader on their devices, and with a locked bootloader, you can’t root your device. Instructions for unlocking your bootloader are generally found within the instructions for rooting your device.

What Are Custom ROMs?

ROM stands for Read-Only Memory, but that name is a bit misleading nowadays since it has nothing to do with that anymore. A ROM (at least in the Android world) is basically the software that your device runs.

So, when you pick up an HTC smartphone, it looks and behaves differently than a Samsung smartphone. That’s because HTC and Samsung both took the original Android code, tweaked it, and developed their own ROMs. HTC’s ROM is different from Samsung’s ROM, even though they’re both Android.

A custom ROM, then, is a ROM that was built not by the manufacturer, but by someone else. Sometimes it’s just a lone programmer with some time on their hands and a passion for making ROMs — other times it’s a company (like CyanogenMod) that has a team and intentionally makes a certain type of ROM.

Once you’re rooted, you can flash a custom ROM. Flash in this case basically means to load or install. Flashing a custom ROM means you are installing a new ROM on your device, and completely wiping the old ROM.

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When looking for custom ROMs for your device, there are some names you’re likely to run into:

AOKP: Stands for the Android Open Kang Project. It’s an open-source ROM which means that you might see people make variations of it that have slight changes and say they were based on AOKP.

CM: Stands for CyanogenMod. What used to be a tiny but popular ROM has blossomed into a full-blown company that produces software. CyanogenMod even came preloaded on the original OnePlus One. They have an awesome theme engine The Best CM11 Themes For Your Android Device The Best CM11 Themes For Your Android Device Running CyanogenMod 11 and want to customize your device? These themes make it easy and super fun. Read More with tons of free themes More Of The Best Free CyanogenMod Themes More Of The Best Free CyanogenMod Themes Looking for a quick, easy, and free way to customize your Android device? Check out these themes! Read More .

AOSP: This is the version of Android that Google gives to the world, often called stock or stock Android. You might see people say that their ROMs are “AOSP-based” or “based on stock Android”, which just means they took the AOSP code and altered it to their liking.

Paranoid Android: A generally simpler ROM with less clutter and nicer aesthetics.

PAC-man: Get it? Like the little yellow guy from the video game? PAC-man is actually packed to the brim with features since it is a combination of three popular ROMs: CyanogenMod, AOKP, and Paranoid Android.

But, don’t be afraid to try ROMs with other names from lesser known folks. These aren’t the only trustworthy ones, they’re just generally the most widely known. We compared a few of them What Are The Best Custom Android ROMs? What Are The Best Custom Android ROMs? The moment you realize you can flash your Android phone with a new ROM is a pivotal one. Suddenly, you're free: Endless customization options, no more vendor bloatware, and, best of all, you don't have... Read More  a while back.

Other Useful Android Terms

Custom Recovery

If you like to tinker with your Android device, you might end up spending a lot of time in the recovery. It’s where you can flash ROMs, make backups, and generally do the heavy lifting.

However, the stock recovery on your device can’t do any of that stuff, so you need a custom one. There are two major players here: TWRP and CWM What's a Custom Recovery? Exploring CWM, TWRP, and Friends What's a Custom Recovery? Exploring CWM, TWRP, and Friends If you've ever considered tinkering with your Android device, you've probably read that you need to flash a custom recovery onto it before you can do anything serious. But, that begs some questions. Read More .

TWRP stands for Team Win Recovery Project, and CWM stands for ClockworkMod. It generally doesn’t matter which you use, unless the specific ROM that you want requires one recovery or the other.

Nandroid backup

There are of course ways to backup your Android device without rooting it, but a Nandroid backup is the most complete backup What Is A Nandroid Backup and How Exactly Does It Work? What Is A Nandroid Backup and How Exactly Does It Work? You need that backup at the ready. Read More you can have. It essentially makes a full copy of everything on your device and saves it.

That way, if you screw up anything (since you have root access and that is possible), you can always just flash your Nandroid backup and return to where you were.

The name is just NAND (a type of flash memory) and Android mashed together.

Xposed

Want to make significant changes to your device but don’t really want to flash a custom ROM? That’s where Xposed comes in handy Customize Your Phone Without Flashing a ROM With The Xposed Framework Customize Your Phone Without Flashing a ROM With The Xposed Framework It is common knowledge that the best way to customize your Android device is to flash it with a new ROM. It is also wrong. Read More .

xposed-framework

Xposed is a framework that allows you to install modules that can alter your device far more than any app. It’s extremely useful for making just a few tweaks without changing absolutely everything.

Kernel

The kernel is like the engine of your operating system — you don’t really see it, but it’s in the background doing all the hard work.

If you want, you can flash a custom kernel Why You Should Consider Using A Custom Android Kernel Why You Should Consider Using A Custom Android Kernel Do you want the best performance out of your Android device? Or maybe you want the best battery life? Consider a custom kernel. Read More . Sometimes these kernels are optimized for performance or battery life — sometimes they’re just necessary to get something to work right (like Double Tap To Wake).

Either way, you can be okay just sticking with your stock kernel unless you really want to change it.

Brick

To brick your phone is essentially to break it. If your phone isn’t working anymore, you’ve bricked it. This is generally not a phrase you’re going to be happy to run into.

soft brick generally means it’s fixable. Maybe you’re stuck in a bootloop (your phone just continually reboots) or you boot it up but it only displays half the screen properly. That’s generally fixable.

hard brick is when the device is toast. You messed with something at a system level that can’t be fixed, and your device is out of commission. Sorry. This is a rare thing to happen, but it can happen — and you’ll see warnings everywhere that no one but yourself is responsible for your device being bricked.

Fortunately, if you follow these steps to avoid bricking 6 Key Tips To Avoid Bricking Your Rooted Android Device 6 Key Tips To Avoid Bricking Your Rooted Android Device When you own a rooted Android phone running a custom ROM, you need to take some precautions or risk "bricking" (destroying) your device. Read More , you probably won’t end up with a ruined device.

Superuser/SuperSU

Superuser and SuperSU are two different apps that basically do the same thing. If you have a rooted device, you need only one of them.

superuser-titanium-backup

They are in control of which apps are granted root permission or not. When an app requests root access, they will ask you if you would like to grant that app root access. This way, random apps can’t just get root access without your permission.

How Do I Get Started?

Anyone who’s going to tinker with their Android device should head to the XDA-Developers forums and look under their specific device. Everything you need is going to be tailored to your specific device Alternative ROMs For The HTC One: What Are Your Options? Alternative ROMs For The HTC One: What Are Your Options? Want to try out some other ROMs? Here are four awesome ROMs for the HTC One you just have to try. Read More (which is why it’s difficult to make a full-fledged rooting guide Take Control: Android Rooting Guide Take Control: Android Rooting Guide As of the writing of this guide, approximately 80% of the world's population owns their own cellphone. Out of those, 1.08 billion are smartphones. Read More ), and maybe even your carrier’s version of that device.

And there are downsides. Some apps won’t work if they sense that your device is rooted (though there are ways around that How To Trick Apps Into Thinking Your Android Is Not Rooted How To Trick Apps Into Thinking Your Android Is Not Rooted You're the kind of person who roots your Android device and refuses to let others tell you what you can and cannot do with it, so run the apps you want with no restrictions. Read More ), and you could potentially ruin your phone if you’re not careful.

But it can be totally worth it. Having a rooted device gives you complete freedom over how it works, and sometimes just the process of rooting and flashing ROMs can be a lot of fun.

Are there any other terms you would add to this list? What confused (or still confuses) you most about Android lingo? Let us know in the comments!

  1. rockies
    May 24, 2016 at 11:55 am

    Custom recovery needs more explanation.

  2. Joe
    April 9, 2016 at 4:28 pm

    There are a review somewhere that ranks devices on their "openness" to being rooted? Like a 10 ten devices for ease of rooting?

  3. pat
    March 6, 2016 at 3:41 pm

    whether the firmware changes

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