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I have an LG Optimus One P500 phone which has an official update limited to Android Gingerbread 2.2.3. But I've heard of people installing ICS custom ROMS on their phone even though officially it is not supported.

My phone has the following specifications:

CPU: 600MHz
RAM: 512MB
Current OS: Gingerbread (runs very smoothly with no lags for any tasks)

So I'm just trying to find out what are the minimum requirements for ICS and whether a phone will continue to function as smoothly as it did for Gingerbread.

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Jellybean is available for the Zte Blade in the form of a kang of CM's 10.1, and your handset has the identical spec as the Blade itself.... just saying ;) –  t0mm13b Feb 1 '13 at 16:21
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2 Answers

up vote 4 down vote accepted

As Peter mentioned, the requirements given might apply to stock ROM. Things may look different with special Custom ROMs. Take e.g. the HTC Wildfire, which comes with just a 576MHz single-core CPU and 384MB RAM (see GSM Arena for full specs), and thus wouldn't meet the minimum requirements. But put Paranoid ROM on it, which runs 4.0, and it's reported to run even smoother than before (no big deal, after kicking HTC Sense, I guess ;)

So it very much depends on multiple factors: How close does the device come to the "minimum requirements", and how well was the custom ROM optimized. I'd say with your specs that close (even slightly above) to the mentioned HTC Wildfire/Buzz, chances are good -- very good, indeed:

Head over to XDA, read the topic, and grab your copy of Paranoid Android for the Optimus One (P500):

  • Android 4.1.2
  • ParanoidAndroid v2.2
  • Fully source compiled.
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Awesome! This Paranoid Android looks very promising. I'm going to look into this in more detail. Thanks for suggesting about this. –  Mugen Feb 2 '13 at 8:24
    
You're welcome! Watch out when reading that XDA thread. For the Wildfire I found at least 2 more ICS ROMs in the signatures of the posters :) –  Izzy Feb 2 '13 at 21:06
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The minimum requirements should be something around 800+ MHz CPU and 256+ RAM/ROM. That should be for a stock ICS ROM. Custom ROMs on the other side, are developed for a specific device, so their minimum requirements may be different. This can be achieved by enhancing the ROM to be able to get almost the same features (or more depending on the custom ROM) as the stock ICS.

The downside of custom ROMs is that not all go as smooth as a stock ROM, since many of them have several core items modified and under certain circumstances they might fail (or don't response in a good manner).

If your phone is rooted and you have a custom recovery, I would suggest you do a nandroid backup to save the state of the phone as it is right now and give it a try to a custom ROM. If you find the custom ROM doesn't meet your expectations, you can restore the nandroid backup and recover your previous phone ROM.

For those who aren't familiar with nandroid backup, it creates an image of the entire phone (like Norton Ghost or Clonezilla), so if you mess something up you can recover your phone from that image.

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Thanks for the info. I'll make sure to use nandroid before I try to root. –  Mugen Feb 1 '13 at 15:57
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