Downgrading to 4.1.2?

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Iqbal Ansari

Senior Member
Jun 6, 2012
932
194
Bhopal
Hello,

I'm on NA5 rom with Mk6 modem. I want to downgrade to MH4 4.1.2 with MG2 modem.
I would like to know if I do this will I get IMEI issue.

Can somebody tell me is MG2 a EFS V2 modem or EFS V1 modem?
 
boomboomer

boomboomer

Senior Member
Jun 30, 2010
3,904
828
To my knowledge v2 efs started at EMG4 so you will need a backup of your efs, while it was still v1 to downgrade.

Sent from my GT-I9300 using Tapatalk
 
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mankidavu

Senior Member
Feb 15, 2014
116
23
Samsung Galaxy S III I9300
Iqbal Ansari said:
Hello,

I'm on NA5 rom with Mk6 modem. I want to downgrade to MH4 4.1.2 with MG2 modem.
I would like to know if I do this will I get IMEI issue.

Can somebody tell me is MG2 a EFS V2 modem or EFS V1 modem?
Click to expand...
Click to collapse

From MG4 onwards, EFS V2 modifications came.
From this thread :

From July 2013 (XXEMG4) onwards, official Samsung ROMs change the format of your EFS Directory/Partition. Let's say these ROMs change from EFS v1 to EFS v2. Only basebands from July 2013 (MG2) onwards can read EFS v2.
Click to expand...
Click to collapse
 
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    boomboomer
    boomboomer
    To my knowledge v2 efs started at EMG4 so you will need a backup of your efs, while it was still v1 to downgrade.

    Sent from my GT-I9300 using Tapatalk
    View
    1
    M
    mankidavu
    Iqbal Ansari said:
    Hello,

    I'm on NA5 rom with Mk6 modem. I want to downgrade to MH4 4.1.2 with MG2 modem.
    I would like to know if I do this will I get IMEI issue.

    Can somebody tell me is MG2 a EFS V2 modem or EFS V1 modem?
    Click to expand...
    Click to collapse

    From MG4 onwards, EFS V2 modifications came.
    From this thread :

    From July 2013 (XXEMG4) onwards, official Samsung ROMs change the format of your EFS Directory/Partition. Let's say these ROMs change from EFS v1 to EFS v2. Only basebands from July 2013 (MG2) onwards can read EFS v2.
    Click to expand...
    Click to collapse
    View

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