[General Questions and Answers] xdaco:
Hi, aman

I think is a very bad choice to choose Mi270 as a dual sim android . I have already posted in this thread not choose this phone .

This phone has several limitations.

1. The cpu clock frequency is merely 200Mhz. It really really sucks after installing few apps.

2. There is no official custom Recovery like CWM .

3. IMIE no. gets wiped if you factory resets the phone. So you have to backup your IMEI no. before you perform an factory reset.

4. Does not support usb flashing mode . ( most of the MTK chip based phone does not support this)

5. You have to use special setup for flashing the phone . I have already mentioned this.

6. No overclocking is possible as the cpu clock is at its maximum frequency .

7. No multi touch .

8. No adb support.

9. Battery sucks .

How to root :

( Only for froyo build )

1. Download z4root.apk attached with this post.

2. Copy this to your sdcard.

3. Enable unknown source .

4. Install the apk.

5. Run z4root.

6. The app is really easy to use. Just follow the on screen instruction.

7. Once you are done install Quickboot and Root Explorer.

8. Replaced the default launcher with Launcher Pro. And then disable the 3d drawer view.

9. Your phone will now work smoothly.

Remove bloatware:

1. Once you are rooted and installed root explorer then you can remove the bloatwares. Remember this phone does not work with adb . So whatever system modification is done is highly risky. You may brick your phone . I will suggest not to play with the system lib files and other folder if you do not understand them.

Ok now open root explore. navigate to /system/app.

and delete all the apk which don't want . Like just dial, Mguruji, Naukri,nimbuz, Reuters,social gaming, vuclip, wapedia, yahoo, yahoo mail, yahoo messenger etc

Please don't delete the following apks.

Phone , dialer, message , laucher, keyboard

See bloatware means whatever you don't want or which affects the performance of the phone. I have deleted yahoo services as they are always running in background and consuming battery and gprs.

I also suggest that to keep copy of these apks if in case you want to use them later. So before deleting anything just copy them to sdcard and later save them in your pc.

How to backup the whole ROM:

I really don't know. As there is no full working CWM recovery , you can not perform a nandroid backup. I found an custom made CWM recovery and tested . But gives an error "misc partition not found" . I could not find any good workaround to solve this.

So, if you manage to find the official RUU of the phone , then I can guide you how to flash it and what cable and software needed for that.

How to flash the phone with official nb image:

will update this shortly with Mi270 specific information if anybody is having official system images and share it here.

For general info read this blog.

Recommended Reading:

Please the first few pages of the following post. It is good to know.

http://xdaforums.com/showthread.php?t=1285573

How to perform Factory Reset :

I would suggest not to do it as it does not help at all. It just wipes the data partition. So if you messed up with system partition , factory reset will not help at all.

So first backup your IMEI no. By the following method .

It is stored as MP0B_001 in the following location. You need to use root explorer to copy or paste this file.

/data/nvram/md/NVRAM/NVD_IMEI/MP0B_001 (older firmwares)

/nvram/md/NVRAM/NVD_IMEI/MP0B_001 (rumored location for newer firmwares)

To be updated this post soon .

One good thing is that if you forget to backup this IMEI file , then you can generate it if you know your IMEI by using the IMEI generator attached with this post .

Download their IMEI generation program imei_mtk6516.zip, use the correct executable (PC, Linux, ARM provided) to generate a new MP0B_001 like this:

imei.xxx <15digit_IMEI_1> <15digit_IMEI_2>

So if you are on windows, then

imei.exe <15digit_IMEI_1> <15digit_IMEI_2>

Once the factory reset is done you have to paste back the IMEI file to the previous location . Else your network will say invalid IMEI.