How to Install a Custom OS (ROM) on Your Android Phone 

Start here to build Android. source.android.com/setup/build That is not for the faint of heart, and requires a lot of time and energy to work. Start with the closest thing possible, and then start debugging. I did this once for a tablet between Android 4 and 5, and it was not simple. Skipping 5 or 6 major versions is daunting at best. I seriously doubt you'll get Android 10 or 11 to run on something that old though. I think you'd be better off just getting a newer device that runes 10 or 11. They are pretty cheap in any case.

A lot of time, patience, and debugging -- that's how. I tried this one, and It's not a simple as downloading the code and compiling for your device. And it might not even be possible if your device is using some closed-sourced drivers and the like, which is not uncommon. You have to figure out how to move those from a supported version or a similar device to a new version of the source code and hope they are compatible. Usually, they aren't. :( source.android.com/setup/build/building

Thanks for the feedback. The great thing about YT is you can FFWD through the video.

@@Atmosera- I watched at double speed and skipped over the chat.. at cost of Fear Of Missing Out. It was still painful. Try not to take it personally. I just needed a more brutal and blunt introduction.

@@billyireland4890 Nothing taken personally. Folks have opinions about stuff. I appreciate feedback though. Always looking to improve.

@@Atmosera- You can add timestamps and "chapters" to navigate inside the video to help FFWD through the video. I have to agree with the other user that there is "too much information". I'm at around 6mn in, I kept forwarding to try and see when you discuss something that I'd like to know, but I have no way to know when you'll discuss these things, let alone if you discuss them at all. The video is 26mn long, it's not 5mn long. btw the only reason it feels like too much information is because we don't know what you will discuss exactly, nor when you'll discuss it, and i the meantime we are stuck listening to a lot of information about stuff we don't want to hear now. Simply having chapters or a table of contents of some sort would be enough. You took the time to write a powerpoint for the video, so I can't believe that making a ToC would have taken more than 2mn.

@@ApiolJoe Thanks for the feedback

You'd have to look up what is supported on your device. I am not familiar with that one.

That depends on the device what it will support. Arrow and Lineage though are very similar. THey are focused on phones.

@@Atmosera- Hi great video, i found a broke android phone A20 and fixed it hardware wise, but in order to use it now i need to be able to bypass the pin # because it's registered by factory default ,how i can do that, does this will do the job thanks?

@@MrSilv55 I am not sure I would know how to do that. You could try to contact the vendor for support. A factory wipe might work, too, but that's pretty device specific.

@@Atmosera- No; i did a factory wipe and still need a pin# and google account.

Not likely. That's a pretty old device. You'd probably doe well to recycle it and get a new one.

@@Atmosera- I can't buy a new one at the moment. Should i try this method or just use it like it is going on? I am a student so can't get a new one.

@@shrine2975 You're not likely to find anything newer. I don't know of any ROMs for that device. It may or may not work...

You'll have to google it for your device. TWRP is a custom depending on your device.

You can sometimes find after market mods for it, but I can't really answer that for a specific device. You'll have to find someone who ported it.

This is more informational than a specific "how to".

I can't speak for your phone, but debloat apps exist. Check this one thread out. forum.xda-developers.com/t/script-2021-01-30-v2-9-universal-android-debloater.4069209/

I'm not sure. You'd need to find a ROM for it it and see if it will work.

@@Atmosera- Thanks!

Agreed

Don't know. I am not familiar enough with at model. Android 4.4 is pretty old though.

Sometimes, that's a driver issue. Sometimes, it's a USB3 port and you should use USB2. Just some things I've run into in the past.

I used my device as an example. The apps and file system parts are part of the Android ecosystem.

If it works, cool. Not likely though.

You can try it without drivers and see it it works. Otherwise, it's up to the manufacturer to release those. I've never heard of Micromax until you mentioned them. You can try these, but I have no idea if they work or not. nerdschalk.com/download-micromax-canvas-xl-drivers-usb-adb-windows/

Can't say that I do.

@@Atmosera- Thanks.

I am not really familiar with that device. Check XDA for the latest for your device.

You'll have to find a ROM for it... Even an old ROM will work for shell access if you can find one.

You can unroot devices. Depend on that phone, though.

Have fun with that. This video isn't for you then. :P

Best thing to do is search for your device and add "ROMS" to the search, and if you can't find any, then it's likely they don't exist. Not every device gets ROM's, especially more less popular ones.

That was not the intent of the video. Checking for locked or unlocked is usually very device specific.

The great thing about YT is you can FF. You don't have to listen to the first part if you know that stiff already. Not everyone does.

The OEM Unlock tells the OS that you're unlocking the phone.

@@Atmosera- even my bootloader is unlocked it says recovery: failed validation foot (6)

@@teodortodorov6974 Not sure what to tell you. Every phones bootloader is different, which is why it's hard to tell you how to unlock your device.

it's for security, you have to enable OEM unlocking in developer settings before you can unlock it from the download mode so that android can make sure you REALLY want to void your warranty by unlocking the OEM, and to make sure the device isn't SIM locked

Just google one and get an old one off Ebay. Galazy S4 should work.

If your device will support it. Look for a ROM based on 11 for your device.

there is no legal trouble. it wasnt me who stole it if it was idk. the person who threw it away prob couldnt figure out how to use it and i thought i could maybe if i can just reinstall the OS cause google terms and stuff they dont want you to use old phones they just want you to buy a new one if something like this happens

I'm not sure how you would do that. The presidential alerts tap into the EBS. You'd have to remove that from the codebase do it. If a custom OS already supports turning that off and it works with your phone, you can simply apply that ROM to you phone.

@@Atmosera- ok, thank you

You can do it with a Mac or a Linux box as well. You'll need the tools (ADB and FastBoot) for your platform to work.

The lock is a bootloader lock, which prevents you from sideloading third party ROM's or getting root access to the device. You must unlock the bootloader to to put a ROM on.

You can't enable OEM unlock in developer settings if your phone is locked, for this exact reason

This was intended to be general tutorial, not a specific device.

flash gapps

@@harshini0076 Hi Harshini will check it , any idea to remove other unnecessary files in OS , like phone calling, etc . Need only files like display for tft screen , wifi , Bluetooth , audio , usb are needed. Assume I am using the tablet as a 3d scanner, hardware connected to usb , so apps & unnecessary OS files are not needed .

@@Blue.star1 nope

@@Blue.star1 google it

You can access Play Store. Play Store gets installed with open gApps. If the app does security checks, though, it might not run. So it depends on the app.

Every phone is different, so I can't really tell you what the requirements would be.

Ha! :)

Why I still use XP & run a FB group. How to make drivers, software to keep support going and running on new computers.

As long as nobody likes Mac Os 🤮

You can ask here.