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I own a MicroMax A100. I want to install the latest version of a different ROM (Samsung or Nexus).

Is it possible? If so, can you tell me how?

If not, can I install a ROM made for a different device, but from the same manufacturer? For example, could I install a ROM for the MicroMax A110, which is the successor of A100?

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Please do not edit in a second question -- only one question per post. If you have another problem (like now with the backup), make that a separate question. –  Izzy Dec 21 '12 at 20:17

1 Answer 1

up vote 5 down vote accepted

Short answer:

You can only install ROMs compatible with your device

Longer version

Different Android devices use different hardware, which requires special drivers (e.g. the camera). Those drivers are sometimes/often proprietary (take e.g. Sony, which almost made it into the AOSP project -- but had difficulties due to those proprietary parts and thus had to back-out again: AOSP only allows for non-proprietary, Open Source code, like its name suggests: Android Open Source Project). Installing an incompatible ROM, in the best case, makes components of your device unavailable (they are simply not working). In the worst case, you might "brick" it (it won't even start up).

You might want to check the question Where can I find stock or custom ROMs for my Android device? to find ROMs compatible with your device. Most times, there are several choices available to meet the user's requirements: Less "bloatware" but more performance, more fancy stuff, custom enhancements... So you still can make your pick.

Other recommended readings on this topic:

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@Izzy: if I brick the device, can I somehow go back to installing a compatible rom? (sorry if that's a stupid question, I have a feeling if the thing won't even start up then any ROM is now impossible, but I want to confirm). –  aditya menon Jan 19 at 10:54
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@adityamenon in most cases that's possible, but might be a little tricky – depending on how much went wrong, and depending on the device. As long as you can still boot into (custom) recovery, or fastboot mode, or (on some devices) download mode, there are ways. –  Izzy Jan 19 at 12:53
    
Okay, thanks... –  aditya menon Jan 19 at 15:40

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