Solved: Flashed SGP612 firmware on SGP621 device. - Xperia Z3 Tablet Compact Q&A, Help & Troubleshooti

Update: I was wrong. It's a SGP612 not a SGP621. :silly:
Hi all,
it seems that I incidently turned my SGP621 into an SGP612 by installing a wrong boot.img. Even Emma now detects a SGP612 and therefore installs Lollipop 5.1.1 for a SGP612 device if I do a desaster recovery.
How can I turn my device back into a SGP621?
Actually I'm looking for a custom ROM with which I can switch to a newer Android version than Marshmallow 6.0.1.
What can you recommend? LineageOs, FLoko or something else? I need at least Android 7 but newer versions are also welcome.
Regards
Polly
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Related

[Q] No mobile network or invalid SIM with with 7/8 ROMS. Why?

I've been using the pac-man ROM for over a year now, but it's a very old version, buggy and outdated. I wanted to try Kit Kat or basically just find a stable ROM, but pretty much ALL of the ROMS i've tried end up unable to find any mobile network or display the SIM card as invalid. Even when I search for networks or try to add a network manually, it still doesn't stick. Occassionally it'll even find the my local network when I go in settings and do a network search, my network being that of China Unicom, but it always results in failure to subscribe, please try again later. This has happened on a good 7 out of 8 ROMS i've flashed. The ONLY ROM i've ever been able to find a network on and thus make it usable has been the old 2013 pac-man 3.99 build. I've searched the forum and google for answers, such as flashing a particular modem or whatnot, but haven't found any solutions.
Does anyone have any ideas? It'd be greatly appreciated. I really need an updated ROM! :fingers-crossed:
If it matters:
Network: China Unicom
I've tried: 4.4.4 CM11, Stone UI hD3, Carbon KK Unofficial 2014-12, CM10.2 nightly, CM 11 M9, KitKat CarbonCN, PC Honami KK RC3, and Xperia Z Z1-1.4.
Only working ROM so far: pa_togari-3.99-RC2-20131104
To use the more modern ROMs you will have to be on a 4.4.4 FTF or you will get baseband issues ie SIM cant connect to network etc
blueether said:
To use the more modern ROMs you will have to be on a 4.4.4 FTF or you will get baseband issues ie SIM cant connect to network etc
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It's been over a year since I unlocked and flashed my phone, and I haven't done any flashing since, so I kind of forget some of the procedures and technical aspects.
I'm going over the FAQ now, and one thing it says is "Never Flash a FTF to a ZU GPe." What is a GPe, and how can we make sure we are not using it?
It also mentioned I should use Sony PC Companion to update to the newest firmware. This means it will update to 4.4.4 FTF right, or do I need to find this and flash it manually? Likewise, after I'm on 4.4.4, I assume my phone will be reverted back to stock. Would I have to root it and unlock the bootloader again?
I remember when doing all this for my phone the first time, since my phone was a Chinese model, 6833 I believe, I went through hell and back for several weeks until it flashed and took the current ROM properly. Something about buggy firmware in that paritcular model, although it's been so long I forgot all the details. I'm worried that I'll run into a similar situation with 4.4.4... Thanks for any help, truly appreciated.
Spixe1 said:
It's been over a year since I unlocked and flashed my phone, and I haven't done any flashing since, so I kind of forget some of the procedures and technical aspects.
I'm going over the FAQ now, and one thing it says is "Never Flash a FTF to a ZU GPe." What is a GPe, and how can we make sure we are not using it?
It also mentioned I should use Sony PC Companion to update to the newest firmware. This means it will update to 4.4.4 FTF right, or do I need to find this and flash it manually? Likewise, after I'm on 4.4.4, I assume my phone will be reverted back to stock. Would I have to root it and unlock the bootloader again?
I remember when doing all this for my phone the first time, since my phone was a Chinese model, 6833 I believe, I went through hell and back for several weeks until it flashed and took the current ROM properly. Something about buggy firmware in that paritcular model, although it's been so long I forgot all the details. I'm worried that I'll run into a similar situation with 4.4.4... Thanks for any help, truly appreciated.
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I tried to update to KK via Sony Pc Companion, but it says my phone is up to date. I assume it says that because it's not seeing any official firmware, due to the flashed ROM. Even when choosing the option to "repair my phone" which says it will re-install the latest available firmware, it states that there is no software available for my device. If memory serves me correct, I must first flash back to my oldest stock firmware that came with my phone, then I can use PC companion to update to KK, and then maybe unlock bootloader and root again, and then I'll be able to flash new ROMs and have a working mobile network, does that sound right?
Out of curiosity, since it's 4.4.4 ROMs that don't seem to work (network wise), doesn't that mean 4.3 ROMs should find a network just fine?
Spixe1 said:
I tried to update to KK via Sony Pc Companion, but it says my phone is up to date. I assume it says that because it's not seeing any official firmware, due to the flashed ROM. Even when choosing the option to "repair my phone" which says it will re-install the latest available firmware, it states that there is no software available for my device. If memory serves me correct, I must first flash back to my oldest stock firmware that came with my phone, then I can use PC companion to update to KK, and then maybe unlock bootloader and root again, and then I'll be able to flash new ROMs and have a working mobile network, does that sound right?
Out of curiosity, since it's 4.4.4 ROMs that don't seem to work (network wise), doesn't that mean 4.3 ROMs should find a network just fine?
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I cant remember where/when the baseband changed, it has been updated several times. I would just go straight to 4.4.4 and not worry about PC Companion - Just use the latest flashtool (http://flashtool.net).
Grab a 4.4.4 (aka x.x.x.108 or .118) FTF from the FTF thread in the dev section and flash that. That will wipe all user data (so back it up) and install a new /system image. You will have to root the device again abut 4.4.4 is easy to root now with the easyroot tool. Then you should be on the latest baseband and all the new ROMs should work - 4.4.4 and 5.0.x
Thanks blueether, I'll give that a go and report back (hope you don't mind). Here's hoping (since i know the 6833 chinese model is finicky)...
Spixe1 said:
Thanks blueether, I'll give that a go and report back (hope you don't mind). Here's hoping (since i know the 6833 chinese model is finicky)...
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You mentioned I should get a *.108 or 118 in order to get the ROMs working again (mobile network wise).
I found in the FTF repository: STOCK ROM] [FTF] Xperia Z Ultra 6833 14.4.A.0.118 "VodaFone UK" and also "SRF FR".
I'm using a 6833 in China, however. My guess is these wouldn't work because they require different networks.
Doesn't matter? Or perhaps, I just flash any 118, and that will give me the newest firmware. Then I can flash other ROMs (that use the same firmware), which will have updated modems, and consequently get my network signal back. Is this how it works? Want to be 100% sure before I go flashing with firmware that would make my phone unusable. Thanks for any advice!
Spixe1 said:
You mentioned I should get a *.108 or 118 in order to get the ROMs working again (mobile network wise).
I found in the FTF repository: STOCK ROM] [FTF] Xperia Z Ultra 6833 14.4.A.0.118 "VodaFone UK" and also "SRF FR".
I'm using a 6833 in China, however. My guess is these wouldn't work because they require different networks.
Doesn't matter? Or perhaps, I just flash any 118, and that will give me the newest firmware. Then I can flash other ROMs (that use the same firmware), which will have updated modems, and consequently get my network signal back. Is this how it works? Want to be 100% sure before I go flashing with firmware that would make my phone unusable. Thanks for any advice!
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any 108 or 118 for the c6833 should work just fine

[ROM][STOCK][5.0.2][C6833] Xperia Z Ultra Pre-Rooted Firmware 14.5.A.0.270 (Lollipop)

Hello, here is a TWRP-flashable pre-rooted original Sony's Lollipop firmware for Xperia Z Ultra. It was made with the aid of Flashtool, Xperifirm and PRFCreator. I thank the authors of these wonderful tools. I encourage you to make your own pre-rooted firmware yourself, but if you are just not interested in such things and your Xperia Z Ultra is C6833, you can just grab it here.
There is just a couple of requirements to get this flashed: any recent version of TWRP already installed to your phone and a microSD memory card. So yes, you need to find a way to install TWRP on your Ultra somehow. Note: ClockworkMod may seem to install this fine also, but in my case the system actually was not properly installed and numerous errors did emerge, so I do not recommend use it for installation.
Here is some technical info regarding this firmware:
Phone: Sony Xperia Z Ultra (codename: Togari)
Phone Version: C6833
Origin: Stock (original by Sony, nothing removed)
Branding: No Brand
CDA: 1276-7737
Market: Russia
Operator: Customized RU
Firmware release: 14.5.A.0.270 / R2D
Here what have been integrated in the firmware by PRFCreator:
SuperSU: v2.46
LockedDualRecovery: v2.8.15
And finally here is the link to the firmware itself on Mega.
Fragmentation said:
Hello, here is a TWRP-flashable pre-rooted original Sony's Lollipop firmware for Xperia Z Ultra. It was made with the aid of Flashtool, Xperifirm and PRFCreator. I thank the authors of these wonderful tools. I encourage you to make your own pre-rooted firmware yourself, but if you are just not interested in such things and your Xperia Z Ultra is C6833, you can just grab it here.
There are just couple of requirements to get this installed: any recent version of TWRP and a microSD memory card. So yes, you need to find a way to install TWRP on your Ultra somehow.
Here is some technical info regarding this firmware:
Phone: Sony Xperia Z Ultra (codename: Togari)
Phone Version: C6833
Origin: Stock (original by Sony, nothing removed)
Branding: No Brand
CDA: 1276-7737
Market: Russia
Operator: Customized RU
Firmware release: 14.5.A.0.270 / R2D
Here what have been integrated in the firmware by PRFCreator:
SuperSU: v2.46
LockedDualRecovery: v2.8.15
And finally here is the link to the firmware itself on Mega.
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Thanks I've been using xslim version but been wanting to try small apps! And all the little tricks it has under its sleeve!
How to install this?
xaoup said:
How to install this?
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You should first install TWRP on your Ultra and then install this firmware with it.
Thanks! Working flawlessly I've been away from stock sony that nearly forget how cool it was!
huertae1985 said:
Thanks! Working flawlessly I've been away from stock sony that nearly forget how cool it was!
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You're welcome. I will share stock pre-rooted ROMs once Sony will release them. I think we may expect at least an upcoming update to 5.1.
Hi,
I am in CrDroid CM12.1 based ROM with TWRP recovery, and would like to flash this ROM. My bootloader is already unlocked, but you have mentioned that you have integrated "LockedDualRecovery", does this mean my bootloader will be again locked ? Do I need to unlock bootloader again to flash CM based ROM, if I would like to do in future ?
Thanks
gurung_vishwas1 said:
Hi,
I am in CrDroid CM12.1 based ROM with TWRP recovery, and would like to flash this ROM. My bootloader is already unlocked, but you have mentioned that you have integrated "LockedDualRecovery", does this mean my bootloader will be again locked ? Do I need to unlock bootloader again to flash CM based ROM, if I would like to do in future ?
Thanks
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Hello. No, your bootloader will stay as it is. LockedDualRecovery is just a piece of recovery software.

How to downgrade from Android 6.0.1 to 5.1.1

Hello
I flashed the latest firmware available for my S6 edge (SM-G925F) : G925FXXU3DPDP (XEF).
I've never used Android 5.1.1 on my phone and I asks to you if downgrade is possible at this point (latest BL I think) and if yes, how ?
Thanks you for your further replies
Bye.
I Think Once u Flashed The latest Firmware U can't Go back
Because Of bootloader
Bt U can try Download Android LP And boot loader And put Ur phone in Download Mode Flash with odin
i updated on 6.02...
didn´t like it...
flashed back to 5.1.1 stock without problems (odin)
Hello poci,
You were running with which firmware ?
It's easy to go back to lollipop?
I'm reading some comments off people wich say No, ando some less who say Yes.
i made an OTA update from 5.1.1 to 6.0.2... but i didn´t like the battery drain on 6.0.2......(or 6.0.1 i don´t know anymore)
after clean install of 6.0.2....there was no change at all...
then i went back to 5.1.1 by flashing a stock 5.1.1. firmware with odin...no trouble or anything else...
If flash fails, is my device will be hardbricked ???
if you have the right firmware...i would say "no"
so why should it fail?
i used this firmware for my o2 edge
G925FXXU3QOLD_G925FTEF3QOL1_G925FXXU3QOJB_HOME.tar
Beceause newest bootloaders blocks downgrade, you was in which firmware on Marshmallow ?
don´t know exactly...60.1 then
when 6.0.2 blocks downgrade...

Downgrade to 5.1.1 Lollipop

Good morning,
I tried to downgrade to Android Lollipop from Marshmallow running Baseband DPL3 and Build DQA7. I used the normal firmware, but also the 4 part one, both did not bring any success.
Do you know if the downgrade is possible with my software version?
Thanks a lot!
Hevy12 said:
Good morning,
I tried to downgrade to Android Lollipop from Marshmallow running Baseband DPL3 and Build DQA7. I used the normal firmware, but also the 4 part one, both did not bring any success.
Do you know if the downgrade is possible with my software version?
Thanks a lot!
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hello , you can not go back my friend regards.
You can downgrade even from 7.0 Nougat! I downgraded too
halloo7 said:
You can downgrade even from 7.0 Nougat! I downgraded too
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how you downgraded is your fingerprint sensor working if everything is ok then tell me which firmware you used????
I'm sorry the fingerprint scanner doesnt work. I used an Engineering Bootloader and flashed the S6 edge 5.1.1 firmware right after that without modem, cm and sboot.bin... fingerprint scanner is a part of cm.bin. I couldnt downgrade that so it's avaiable but not working

Updating Sony Xperia Z2 Docomo

Hi!, I have difficutly in the docomo z2 tab firmware I feel not really comfortable with the bloatware, and docomo stuffs. Should I stay in 4.4 or upgrade to 5.0 or maybe change to global version?
the bloatware from Sony are present in all firmwares, the only difference is that in EU/US versions it's only Sony stuff, in japanese it's also operators apps. All Sony Xperia devices for Japan made specifically with locked bootloader, so you can't use custom clean firmware here, maybe it's possible to delete apps but you need to get root, which is possible with some work even on locked bootloader. But i prefer to just disable maximum as possible, i don't need to use devices for super sensitive information yet, so for now i tolerate presense of some bloatware.
Considering updating, japanese Sony devices can be easily updated to latest global versions (local japanese firmwares sometimes behind global for many Sony devices, in Xperia Z2 tablet the last version for Japan is only Lollipop, but the global is Marshmallow many years already).
You can easily update to Marshmallow official firmware by Flashtool from any country version (except few - like Verizon USA are not flashing), but there's some things which you loose if flashing EU Marshmallow version:
1. NFC - in japanese Sony devices it's different chip or something than in european version.
2. Tethering - global versions of this Z2 tablet with 32Gb is only Wi-fi models - you can flash them easily but there's no tethering at all (because Wi-fi models with no SIM slot), there's no even bluetooth internet sharing, this function are removed from Wi-fi only firmwares.
3. 32Gb - as mentioned above - only Wi-fi models with 32Gb, others are only 16Gb, you are loosing serious amount of space - i tested that and really regretted after month using esp. with big video files like movies and etc., 16Gb is very small for normal use.
So, there's a way to get above this problems but you need to flash your device with flashtool 2 times with different firmwares.
1. To get Marshmallow with 32Gb and NFC - flash fully the latest firmware for SGP512 (USA version) - it's 32Gb and NFC works, but because it's Wi-fi model - to preserve storage size and receive Tethering and SIM card functions do step 2. Install it, activate as usual welcome screen. Turn off and ready to flash again.
2. Take any global firmware for SGP521 and flash it with ONLY such parts – system, kernel and cache (apps_logs and userdata - choose wipe), if it asks for FSC - choose NO. Do not choose other parts.
So in result you will get a combined SGP521 firmware - with NFC, 32Gb, SIM, so like fully working Marshmallow on japanese Xperia. This solution do not require any hacking, it's very easy.
This solution works for all other firmwares, for example if you want to obtain 5.1.1 Lollipop the only available version left is for Ireland (i forgot the number, will write later), there's nowhere else this verison, japanese are only 5.0, but to have a working NFC and 32Gb - you need to flash japanese 5.0 and flash again EU 5.1.1 (only system and kernel again) = you will get fully working 5.1.1 which is rarest on this device.
In addition to my reply:
the original Kitkat 4.4.2 17.1.1.C.1.45 can be upgraded by system & kernel of SGP521 model O2 IE 23.0.1.A.0.167 to Kitkat 4.4.4 (rare on this device)
the original japanese 23.1.G.2.151 Lollipop 5.0.2 by system and kernel of SGP521 model VMo LAM 23.4.A.1.232 to Lollipop 5.1.1 (rare on this device)
the SGP512 VMo US/CA/PR (Wi-fi 32 Gb) 23.5.A.1.291 with system and kernel SGP521 model Customized CE1 23.5.A.1.291 to sim/tethering functionality
excluding all parts of firmware except system and kernel, bootloader kept locked
crustier said:
In addition to my reply:
the original Kitkat 4.4.2 17.1.1.C.1.45 can be upgraded by system & kernel of SGP521 model O2 IE 23.0.1.A.0.167 to Kitkat 4.4.4 (rare on this device)
the original japanese 23.1.G.2.151 Lollipop 5.0.2 by system and kernel of SGP521 model VMo LAM 23.4.A.1.232 to Lollipop 5.1.1 (rare on this device)
the SGP512 VMo US/CA/PR (Wi-fi 32 Gb) 23.5.A.1.291 with system and kernel SGP521 model Customized CE1 23.5.A.1.291 to sim/tethering functionality
excluding all parts of firmware except system and kernel, bootloader kept locked
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Is there any other way such as updating via sony official?. I'm always stuck at usb drivers when using xperia flashtool
IA. said:
Is there any other way such as updating via sony official?. I'm always stuck at usb drivers when using xperia flashtool
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As i know the last one official Android on locked Japanese Z2 tablets is only Android 5.0 Lollipop. It's the only way to update it to version 6, i used Windows 7 and much older flashtool like 0.9.20 - 0.9.23, the most last one version is something changed there it's crushing/not working, old one very stable.
Getting Nougat there (which will bring better battery and multitasking) on locked bootloader which Sony never unlock in Japan - only possible if someone repack old Nougat Developer Preview made for Xperia z3 smartphone i think (which is very good and stable on smartphone). I want to try that but for now stuck with hackintosh of tuning-up Mojave MacOS on my Toshiba Dynabook.
How can I install AICP Pie 9.0 ROM on docomo Xperia Z2 tablet?
Got marshmallow on my Xperia Z2 Tablet Docomo
abeyruma said:
Got marshmallow on my Xperia Z2 Tablet Docomo
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did you get problems with the LTE network bar always up and down?

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