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[Tools, Tips & Tutorials] About Mi 2/2S China Developer Version Merging System Partitions. Updated Nov. 24

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11:33, Nov-20-2015
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Greetings MIUIers,

As we all know, dual system is one of the many amzing features of Mi devices, and it's like a life jacket for passionate MIUI users who're always flashing different ROMs on their devices. But after Mi 2/2S upgraded to Android 5.0, and embraced MIUI 7 later, its system is taking up much more space than it did before. One of the consequences of this sitution is that the remaining system partitions space could not support OTA updates anymore, and Mi 2/2S users often get full ROM file for recent updates.

There have been many complaints about this situation, and our devs have been trying to find a solution for it. After taking all factors into consideration, we've decided to take the method that will cause the least affects or damages, that is to merge the two system partitions.

Thanks for a group of beta testers, we've located and solved some problems caused by merging partitions. Now this change will be implemented in this week's 5.11.19 China version update.

Notes:
1. This update will merge the two systems into one. Mi 2/2S users will be able to update via OTA normally
2. This adjustment will help increase the speed of booting up and launching apps (This will take effect after the 5.11.20 update)
3. There's no need to wipe user data for this update

How to update:
Beta testers have got the 5.11.19 beta update. You can update directly to 5.11.20 on Friday.

For normal users:
1. Go to Settings - Additional settings - Developer options, make sure USB debugging is enabled
2. Go to Updater, install the 5.11.19 update if you got it on your phone
3. After updating to 5.11.19, go to Updater again to find 5.11.20 and Install it to complete the process. Do not update via Recovery, it might cause damage to your device.

Notes:
1. You can directly flash the 5.11.20 fastboot ROM to merge system partitions no matter what's your current ROM version. Remember to wipe all data if you use this method.
2. If you update via OTA, please use Updater app. Do not flash full ROM in Recovery
3. If you've modified system partition yourself before, please flash the fastboot ROM and wipe all user data
4. If you already flashed 5.11.20 via Recovery, it may cause problem like booting into Fastboot page. To solve this, please flash fastboot ROM and wipe all data

5.11.20 Fastboot ROM download link: http://obigota.d.miui.com/5.11.20/aries_images_5.11.20_20151104.0000.4_5.0_cn_9307be9abe.tgz

FAQ:
Q: Can I go back to previous versions after merging system partitions?
A: Yes. Just flash the fastboot ROM and wipe all data

Q: Will stable ROM users get this update?
A: This adjustment is only for developer versions after 5.11.20 currently. Stable ROM users will get the update in the future.

Q: What if something goes wrong during updating to 5.11.20?

A: Flash 5.11.20 fastboot ROM. There's no need to wipe user data.
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16:22, Nov-21-2015 Via mobile
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but the version 5/11/20 for mi2s is already online? Where can I find

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07:20, Nov-21-2015
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It's impossible to download OTA update to 5.11.20. So put the 5.11.20 update to download page, incremental one especially.

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kraklups + 2 Agreed!

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04:29, Nov-22-2015
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hamsta007 replied at 2015-11-21 07:20
It's impossible to download OTA update to 5.11.20. So put the 5.11.20 update to download page, incre ...

I'm having the same issue... Put the DL link please

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13:51, Nov-20-2015
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Sad day for Mi2s users. I loved using dual system.

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11:44, Nov-20-2015 Via mobile
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Bad news for Mi2 users :)

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11:37, Nov-20-2015
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thanks for sharing
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11:38, Nov-20-2015
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thanks for the information
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11:47, Nov-20-2015
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thanks for the information.

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12:22, Nov-20-2015
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thanks for the info
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12:40, Nov-20-2015
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Thanks for the share
Sometimes it is the people no-one imagines anything of, who does the things that no-one can imagine.

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12:50, Nov-20-2015
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OK, sounds interesting.
Is this 5.11.19 (MIUI7)  better than V7.0.4.0.LXACNCI (MIUI7) ???

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13:59, Nov-20-2015
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Thanks for sharing
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