Redmi 9 indian (cattail) ENG Firmware Free Download

Redmi 9 indian (cattail) ENG Firmware Free Download BY SOFT4GSM.PK

What is Engineering ROM and Use of this ROM?

You can test your smartphone for faulty hardware with a specific Engineering ROM for your device!.

Most of the devices has Engineering ROM, which sounds may weird to the person who hearing the name for the first time. This article explains what exactly it is being used for.

What is Engineering ROM?

When a factory make a device, they must have to verify that it works properly before it launched in the market. Or if the device has fault and need to be repaired, and after the repairing process it needs to be verified that it’s working properly before giving it to the owner. The factory or a technician of course can’t know without testing the device out. This is why Engineering ROM exist.

Engineering ROM is a set of software files that are used to install on smartphones by the manufacturer or technician. This allows to check and verify the device and confirm the repair of the device after the building process. In ENG ROM we have testing software and apps inside of it. It’s used to test the whole hardware from the software so that phone can be checked properly before giving to the owner or launch the device out to the world. in such cases, like if some component of device got damaged and should be clarify which exactly component is damaged, this can be possible only with ENGINEERING ROM and the stock firmware of the device doesn’t let you to do that.

What does an Engineering ROM look like?

It’s just pure android, without any modifications (like MIUI), that is light and only made for testing purposes in the device. The phone itself probably will never come with this ROM packed in, as it’s only used for testing purposes.



Here’s a Xiaomi phone running Engineering ROM captured in factory, meanwhile being tested. Normal users probably have nothing to do with this ROM. Only the factory itself, or the technician use this ROM when repairing the device and has to verify that device does working properly.

Here’s all the apps that ROM contains, they are all mostly made to test the device’s hardware such as display, fingerprint sensor, camera, proximity sensor, Bluetooth, CPU’s parts like resistors, GPU, cellular (calling), camera, vibrator, speakers, and many more. Engineering ROM is mostly based on the Android version that the phone came out of the box.

As you can see in the picture above, the ROM contains apps that are for testing purposes for the device’s hardware. The apps in the ROM was being used to test hardware like Wi-fi, Bluetooth and more. Not only the ROM is being used for only hardware, also being tested for hardware speed as well, like RAM working speed, storage speed, etc.


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Here is The Firmware Link Download For Free 

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