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[Q] How to downgrade HTC 8S Preview 8.1 to 8?

OP Kami Look

30th July 2014, 03:44 AM   |  #1  
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Hi
Is any way to downgrade htc 8s preview WP 8.1 to 8?
30th July 2014, 12:51 PM   |  #2  
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Quote:
Originally Posted by Kami Look

Hi
Is any way to downgrade htc 8s preview WP 8.1 to 8?

Hi,

Use http://forum.xda-developers.com/show....php?t=2195035
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31st July 2014, 03:11 PM   |  #3  
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But care when you do the downgrade cuz you have to use the good rom for this (Europe or Rus) otherwise you will brick your phone. I just downgraded my HTC 8s from 8.1 DP to 8.0 and it worked!

1. Copy UEFI_signed.nbh to sdcard
2. Rename UEFI_signed.nbh to RIOUDIAG.nbh
3. Turn the phone off and put sdcard into the phone
4. While holding Volume down - camera buttons press power button
5. Wait until flashing is finished
6. Copy RUU_signed.nbh to sdcard and rename it to RIOUDIAG.nbh
7. Turn the phone off and put sdcard into the phone
8. While holding Volume down - camera buttons press power button
9. Wait until flashing is finished than reboot phone

Thats It

I have tried 2 ROMs.
1. RUU_RIO_U_APO_00_HTC_Europe_1.04.401.03_1.11b.3054 .25_10.13.30_RETAIL_ENC_RELEASE

Languages:
Catala, dansk, Deutsch, English, espanol, francais, italiano, Nederlands, norsk, portugues, suomi, svenska, Turkce, arabic

2. RUU_RIO_U_APO_00_HTC_RUS_1.04.411.03_1.11b.3054.25 _10.13.30_RETAIL_ENC_RELEASE

Languages:
čeština, eesti, hrvatski, latviešu, lietuviu, magyar, polski, romana, slovenčina, slovenski, srpski, greek, belaruskaja, bulgarski, kazak, russkij, ukrajinska, arabic
1st August 2014, 03:02 AM   |  #4  
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Quote:
Originally Posted by Degetel

But care when you do the downgrade cuz you have to use the good rom for this (Europe or Rus) otherwise you will brick your phone. I just downgraded my HTC 8s from 8.1 DP to 8.0 and it worked!

1. Copy UEFI_signed.nbh to sdcard
2. Rename UEFI_signed.nbh to RIOUDIAG.nbh
3. Turn the phone off and put sdcard into the phone
4. While holding Volume down - camera buttons press power button
5. Wait until flashing is finished
6. Copy RUU_signed.nbh to sdcard and rename it to RIOUDIAG.nbh
7. Turn the phone off and put sdcard into the phone
8. While holding Volume down - camera buttons press power button
9. Wait until flashing is finished than reboot phone

Thats It

I have tried 2 ROMs.
1. RUU_RIO_U_APO_00_HTC_Europe_1.04.401.03_1.11b.3054 .25_10.13.30_RETAIL_ENC_RELEASE

Languages:
Catala, dansk, Deutsch, English, espanol, francais, italiano, Nederlands, norsk, portugues, suomi, svenska, Turkce, arabic

2. RUU_RIO_U_APO_00_HTC_RUS_1.04.411.03_1.11b.3054.25 _10.13.30_RETAIL_ENC_RELEASE

Languages:
čeština, eesti, hrvatski, latviešu, lietuviu, magyar, polski, romana, slovenčina, slovenski, srpski, greek, belaruskaja, bulgarski, kazak, russkij, ukrajinska, arabic

tnx dude
i have RUU 401
also preview 8.1 is so cool and i have no problem with that
although the official 8.1 be released i will downgrade my phone
Last edited by Kami Look; 17th August 2014 at 10:11 PM.
1st August 2014, 06:03 PM   |  #5  
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Quote:
Originally Posted by Kami Look

tnx dude
i have Rus rom 401
also preview 8.1 is so cool and i have no problem with that
although the official 8.1 be released i will downgrade my phone

There's no information for htc 8s that will receive 8.1 but with DP program next week you will receive windows phone 8.1 update 1 (GDR1) which will come with some new features. My opinion is to wait until they will release the official update for windows phone 8.1 and then downgrade.
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3rd August 2014, 09:36 PM   |  #6  
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Quote:
Originally Posted by Degetel

There's no information for htc 8s that will receive 8.1 but with DP program next week you will receive windows phone 8.1 update 1 (GDR1) which will come with some new features. My opinion is to wait until they will release the official update for windows phone 8.1 and then downgrade.

tnx for information
8.1 gdr1 should be released in the same week...
I have DP program and I'll be sure to update it and when the official update 8.1 released for HTC,i'll downgrade to 8
tnx body
10th August 2014, 11:43 AM   |  #7  
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Quote:
Originally Posted by Degetel

But care when you do the downgrade cuz you have to use the good rom for this (Europe or Rus) otherwise you will brick your phone. I just downgraded my HTC 8s from 8.1 DP to 8.0 and it worked!

1. Copy UEFI_signed.nbh to sdcard
2. Rename UEFI_signed.nbh to RIOUDIAG.nbh
3. Turn the phone off and put sdcard into the phone
4. While holding Volume down - camera buttons press power button
5. Wait until flashing is finished
6. Copy RUU_signed.nbh to sdcard and rename it to RIOUDIAG.nbh
7. Turn the phone off and put sdcard into the phone
8. While holding Volume down - camera buttons press power button
9. Wait until flashing is finished than reboot phone

Thats It

I have tried 2 ROMs.
1. RUU_RIO_U_APO_00_HTC_Europe_1.04.401.03_1.11b.3054 .25_10.13.30_RETAIL_ENC_RELEASE

Languages:
Catala, dansk, Deutsch, English, espanol, francais, italiano, Nederlands, norsk, portugues, suomi, svenska, Turkce, arabic

2. RUU_RIO_U_APO_00_HTC_RUS_1.04.411.03_1.11b.3054.25 _10.13.30_RETAIL_ENC_RELEASE

Languages:
čeština, eesti, hrvatski, latviešu, lietuviu, magyar, polski, romana, slovenčina, slovenski, srpski, greek, belaruskaja, bulgarski, kazak, russkij, ukrajinska, arabic

Would this add English US as Phone Language (to enable Cortana)?
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10th August 2014, 03:29 PM   |  #8  
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Quote:
Originally Posted by nikiu

Would this add English US as Phone Language (to enable Cortana)?

I think that you will need "American ROM" for that. On my phone i have 2. RUU_RIO_U_APO_00_HTC_RUS_1.04.411.03_1.11b.3054.25 _10.13.30_RETAIL_ENC_RELEASE and it has English UK as default language.
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13th August 2014, 05:28 AM   |  #9  
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but what about downgrade for 8x ?

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