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Downgrade from B9xx to B8xx

34 posts in this topic

Posted (edited)

thats cool.

which method did you choose

Edited by luvvt
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Posted

What happened to the difference in base bands, I am aware that flashind a nandroid backup of ics roms over ics roms has advantages as in B926 to B934 in regards to HSPA but i thought flashing a cwm img of B8xx over a B9xx rom wouldnt work as the base bands are different.

For my sanity can someone please clear this up for me

That won't work. As far as I know ROMs are pretty much locked to a baseband so trying to CWM flash a rom onto a non compatible baseband should result in a huge fail. Radio wont work, IMEI would be messed up etc.

Well, funny thing is that after my downgrade to B885 and then upgrade to B934 my phone became much faster, UI is more responsive - it's not that fast as on B8xx, but it's more usable than before.

This seems to be the case for some people, for some reason..... However for me GB lagged quite a bit but when I installed ICS everything was butter smooth, even now with my crazy desktop it's like silky smooth with zero lag. http://www.modaco.co...20#entry2012218

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Posted (edited)

thats cool.

which method did you choose

I just put dload folder with big update.app and went straight to B885. If there would exist a vendor update.app, I would stay at B8xx. (no IMEI zeroing, no middle update.app)

// hehe, B884 has vendor update.app

https://www.dropbox.com/s/gdta5l2al3z69xe/U8815-G300-V100R001C00B884.rar

Edited by ScutulatusCrotalus
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Posted

Rico_89 : I confirm, just a simple operation for me to downgrade :

When running b934 :

I created a dload folder on SDCard

I put big update.app inside

Shut off

Shut on with vol+ vol- power at the same time

2 minutes for Coffee time, that's all, back to b888

But my phone came out of the shop with b893, and i can't find this update anywhere...

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Posted

Rico_89 : I confirm, just a simple operation for me to downgrade :

When running b934 :

I created a dload folder on SDCard

I put big update.app inside

Shut off

Shut on with vol+ vol- power at the same time

2 minutes for Coffee time, that's all, back to b888

But my phone came out of the shop with b893, and i can't find this update anywhere...

yep i forgot about that method, when gary found that method many here were already using the imei hack.

My next flash i think i might have to try

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Posted

Rico_89 : I confirm, just a simple operation for me to downgrade :

When running b934 :

I created a dload folder on SDCard

I put big update.app inside

Shut off

Shut on with vol+ vol- power at the same time

2 minutes for Coffee time, that's all, back to b888

But my phone came out of the shop with b893, and i can't find this update anywhere...

This worked for me too, went from 892 to 934 and back to 892 :)

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Posted

hello, i have b944, can u give an instruction for downgrading this, because none of posts are not saying how to do that????

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Posted (edited)

thx ScutulatusCrotalus, realy, i tryed and its worked.

Edited by MiN^
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