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3g fixes for Defy, wcdma 850, 900, 1700, 1900, 2100Mhz

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By adlx.xda, Inactive Recognized Developer on 6th February 2011, 11:18 PM
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If you loose your 3g after flashing a rom or sbf, try to flash one of those zip to see if you get your 3g back (based on the wcdma(3g) freq your operator work on).

(Edit: in the previous sentence, "operator" was meant for the "original operator" of your phone. So in other words, select what matches your hardware, not your carrier. If you still have the original box, theres a label with the freqs on it.)

freq_F_CN_026-850-2100-signed.zip: 850, 2100MHz (ref)
freq_F_PL_342_131-900-2100-signed.zip: 900, 2100MHz
freq_F_UK_342_117-900-2100-signed.zip: 900, 2100MHz
freq_F_US_342_107-850-1700-2100-signed.zip: 850, 1700, 2100MHz

I've repacked as zip the files that seem to be resposible to gsm/WCDMA frequencies support on the Defy from several dumps (China, Poland, UK, US, all Froyo based). I'm not 100% sure though that it will work, but if it can help.

PLease report your success/failure here

Here is also another zip that is known to bring 3g back to Argentina users on Personal (Thanks gederico):

Fix_3g_850.1900Mhz-signed.zip: 850, 1900MHz


India & South East Asia Defy: http://www.mediafire.com/?k8dsbbq0ceodv86
Vodafone Spain (from Eclair rom, but seem to work for Froyo too): freq_E_ES_VF2.22.0-850-1700-2100-signed.zip
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7th February 2011, 12:18 AM |#2  
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This will greatly improve flexibility to moving between roms for US users. Thanks adlx
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7th February 2011, 01:11 AM |#3  
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Does use the customer recovery to flash, or via moto recovery?
7th February 2011, 06:29 AM |#4  
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Has anyone been able confirm that all these different variants of the Defy actually do have different hardware radios as well? Or are they all the same hardware with soft-controlled bands?

Example: If someone lives in an area where AT&T's coverage is 1900 MHz only and no 850 MHz, you shouldn't get 3G on a T-Mobile 850/1700/2100 Defy. What if you flash the 850/1900 3G files - do you get 3G now?

Do different country variants have a different FCC ID inside?
7th February 2011, 06:37 AM |#5  
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thanks.



ps. are you sure about cn850/2100?
china has cdma800, gsm900 and wcdma2100, so would make more sense to have 2100-only or 900/2100 since wcdma850 would never happen.
7th February 2011, 06:42 AM |#6  
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Mobile phones can have their 3G antennas optimized for certain frequencies. They can all work on all existing UMTS frequencies but it does suggest that different areas means different radios. Now that still doesn't mean that the radios themselves are different of course but at least it is something to look into.
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7th February 2011, 06:42 AM |#7  
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Quote:
Originally Posted by cmstlist

Has anyone been able confirm that all these different variants of the Defy actually do have different hardware radios as well? Or are they all the same hardware with soft-controlled bands?

Example: If someone lives in an area where AT&T's coverage is 1900 MHz only and no 850 MHz, you shouldn't get 3G on a T-Mobile 850/1700/2100 Defy. What if you flash the 850/1900 3G files - do you get 3G now?

Do different country variants have a different FCC ID inside?


i can assure you that 3g radio must be different. unless it has a quad/quint-band 3g amplifier, which doesn't exist yet. intalling multiple amps while not using all of them sounds really stupid to me
7th February 2011, 06:45 AM |#8  
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Quote:
Originally Posted by AgentSmith

Mobile phones can have their 3G antennas optimized for certain frequencies. They can all work on all existing UMTS frequencies but it does suggest that different areas means different radios. Now that still doesn't mean that the radios themselves are different of course but at least it is something to look into.

the baseband chip should be the same just the rf part is different.
7th February 2011, 12:36 PM |#9  
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Quote:
Originally Posted by lackyking

Does use the customer recovery to flash, or via moto recovery?

You need to use Custom recovery :)

I wish I could forge Motorola signature ;-D
7th February 2011, 12:43 PM |#10  
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Quote:
Originally Posted by racca

ps. are you sure about cn850/2100?
china has cdma800, gsm900 and wcdma2100, so would make more sense to have 2100-only or 900/2100 since wcdma850 would never happen.

I'm not 100% sure. I looked for the information yesterday on Motorola's site, specs for Defy in the respective countries. Today I can't get to the ME525 spec page on Motorola.com(chinese). So I can't confirm.

EDIT: just found it:

频率 WCDMA: 850/2100 HSDPA 7.2 Mbps; GSM: 850/900/1800/1900 GPRS; Edge Class 12

source: http://www.motorola.com/Consumers/CN...E525-CN-ZH.alt
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7th February 2011, 05:40 PM |#11  
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Quote:
Originally Posted by adlx.xda

Here is also another zip that is known to bring 3g back to Argentina users on Personal (Thanks gederico):

Fix_3g_850.1900Mhz-signed.zip: 850, 1900MHz


Awesome! I now have a working Defy in the Movistar Argentina 3g/H network!
Even though out of the box, the unlocked Defy made in argentina did not work with Movistar Argentina, Froyo + this fix did work. Very weird bug.. but very cool fix!

NOW I'm happy about my defy!
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