What is the difference between ROM and custom ROM?

But these words aren't exactly defined and a custom ROM is more commonly understood to be an Android version that has been modified. One of the major reasons for modifying a ROM is to make a version of Android that works on a specific hardware platform. "Official" ROMs are designed for the devices they are sold with.
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Which is better custom ROM or stock ROM?

Customization

Another key difference between a stock ROM and a custom ROM will be the sheer freedom of customizing Android to suit one's needs. We're not just talking about visual customization here, things are different from the roots, the features and small tweaks that make big differences in user experience.
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Why custom ROMs are better?

Custom ROMs offer a wide range of customization options, allowing users to select their preferred launcher, theme, icon packs, and other visual elements. Customization isn't the only benefit of installing a custom ROM on your Android device; they have also been proven to enhance performance and overall speed.
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Do custom ROMs improve performance?

Some custom ROMs are optimized for performance, offering improved speed, battery life, and smoother multitasking compared to stock firmware. They often include performance-enhancing tweaks, kernel optimizations, and better resource management.
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What is the difference between custom ROM and official ROM?

Stock ROMs controlled by the manufacturers or carriers may don't provide this update service or take long time to do it. Better performance. Custom ROMs let you install third-party apps you like without any limitations and remove any system apps which can't be uninstalled in stock ROM.
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Official vs UnOfficial Android Custom Roms | Android Custom Rom Basics

Are custom ROMs legal?

roms are legal if you own a legal copy of the game and extracted the rom file from this legal copy.
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How risky is custom ROM?

Yes custom roms are as safe as OEM roms but do download it only from verified sources like XDA and go through all the comments before flashing the rom you have downloaded. If you are doing it for the first time do go for the stable version of the rom and must read all the thread before installing it to your device.
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Can custom ROM damage hardware?

No, hardware isn't damaged on installing custom ROMs.
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Do custom ROMs drain battery?

They certainly can, depending on what purpose the custom ROM was built for. Some ROMS are specifically built for battery savings, some for speed (which usually takes more power), others for user customization. Generally, ROMS built for efficiency will suffer more in the performance department.
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What are the disadvantages of installing custom ROM?

  • Compatibility issues: Custom ROMs may not be fully compatible with all devices, and may cause problems with hardware or software features. ...
  • Risk of bricking: Flashing a custom ROM to a device can be a complex process, and if done incorrectly, can result in a "bricked" device that no longer functions.
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Why not to use custom ROM?

Battery Life Problems: The custom ROM may not be as optimized for your device and may drain the battery faster than the device's official ROM. Hardware Issues: Custom ROMs may not properly support every bit of hardware in your phone, so you may run into bugs, non-functioning hardware, or just other issues.
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Do people still use custom ROMs?

Not anymore, no. If anything custom ROMs these days seem like a downgrade. There's very few features that they offer that isn't in stock (I've got a Pixel 1, Pixel 4XL and 7Pro) and mostly they make the experience worse I feel. The camera usually is worse, you get random crashes/bugs.
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Does custom ROM remove bloatware?

One of the main advantages of using a custom ROM is that it allows users to remove bloatware from their devices. Bloatware refers to pre-installed apps that come with the device, which can take up valuable space and slow down the device. With a custom ROM, users can remove these apps and free up space on their devices.
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Do custom ROMs have security?

Custom Android ROMs like Lineage OS are generally considered safe as they are built from the Android Open Source Project (AOSP) and are open-source, allowing for community scrutiny. However, it's important to download ROMs from trusted sources to reduce the risk of malware or unauthorized access.
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What is the most secure custom ROM?

GrapheneOS is a privacy and security focused mobile OS with Android app compatibility developed as a non-profit open source project. It's focused on the research and development of privacy and security technology including substantial improvements to sandboxing, exploit mitigations and the permission model.
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Can custom ROM damage your phone?

Im new to Android and i've been wondering if installing a custom ROM can damage or break my device? (X3 Pro) thanks. No. You cant damage your device. The worst thing that can happen is bootlooping the thing, which can be easily fixed.
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Does installing custom ROM delete everything?

The steps involved in flashing a custom ROM erase your files and data from the phone's storage. Before you proceed, the first thing you should do is back up your files, data, and apps to your preferred cloud solution or an external memory card.
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Is it OK to delete downloaded ROMs?

Yes, You can because now you have installed it. It's just like installing an app from application package and deleteing the app package. So there is no problem deleting the downloaded file. But I Still prefer you to keep it because if you brick you Device , You can go recovery menu and get back your device.
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Do I need to root my phone to install custom ROM?

No you don't need to root phone in order to install custom ROM . You just need a custom recovery like TWRP(available at play store). Rooting only gives you permission to take over your phone's system like to open and close apps by itself.
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Can I install any custom ROM on any device?

As long as the bootloader is unlocked and any compatible custom ROM is available, you can flash it anytime. The only requirement of flashing of Custom ROM is custom recovery like TWRP. It should also be compatible specifically to your phone model.
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Can custom ROM contain malware?

3 Answers. As long as your blootloader is unlocked, a spyware that has gained privilege escalation on your device can keep itself persistent across custom ROMs. Custom ROMs only flash /system and /boot partition. Some custom ROMs also flash /vendor partition.
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Can I install custom ROM without unlocking bootloader?

No. No custom rom can be installed without unlocking the bootloader.
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What to do before custom ROM?

Create a Backup

The first thing to do before installing a new ROM on your device is to back up all your data. A backup is essential before you do any big changes on your device, and even more so while flashing a custom ROM. The best kind is a NANdroid backup, which is basically an image of your current device settings.
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Does custom ROM get updates?

Android custom ROM security updates depend on the developer of the custom ROM. If the custom ROM is frequently updated and the developer has also set up a custom ROM update server, then the custom ROM should receive security updates over-the-air.
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