yashsingh1/xdaforums huggingface dataset:
[Sony Ericsson Xperia Mini, Mini Pro, Xperia Pro, A] smokerman:
for the first part you install this:http://d-h.st/ZV2

doesnt use more ram then the status bar included and its beautiful. it works (i ve tested) but backup your rom first!;)

the bugs i really dont know..this rom works flawless on my arc S.:eek:

try to flash this for music FC: http://xdaforums.com/showthread.php?t=1864562

:good:
[Sony Ericsson Xperia Mini, Mini Pro, Xperia Pro, A] Joakim112:
Hey guys. I also encounter music FC using poweramp. After 1-3 mins listening it got FC. Any fix for this problem?
[Sony Ericsson Xperia Mini, Mini Pro, Xperia Pro, A] JpDany:
I don't experience music FC.. I experience fb integration FC and "process system" FC with reboots which drives me crazy..
[Sony Ericsson Xperia Mini, Mini Pro, Xperia Pro, A] JpDany:
Btw..what's the recommended baseband for the Rom??
[Sony Ericsson Xperia Mini, Mini Pro, Xperia Pro, A] Saqib Nazm:
Clear data cache of Power Amp, uninstall the app, reboot device, install the app again. If the problem persists again then reflash the rom with full wipe. Cause I use PowerAmp & walkman side by side. No problem here

I don't have FB so couldn't check fb integration, I am trying to find an working fb package. So anyone can find me one, would mean great help to me

What is Process System fc? does it also reboots your phone? then there's must be some sort of problem. follow instruction again

Baseband 77 as in if you flash stock 587 ftf
[Sony Ericsson Xperia Mini, Mini Pro, Xperia Pro, A] JpDany:
I used fb integration files from iced bean 4 in your Rom and it worked flawlessly.... As for the reboots, it occurs mainly during calls. During the call, the phone simply reboots after showing the process system error.. I'm on ctcaer kernel 2.8 1.4Ghz version..
[Sony Ericsson Xperia Mini, Mini Pro, Xperia Pro, A] abcde25:
Kernel

Recommed kernel?
[Sony Ericsson Xperia Mini, Mini Pro, Xperia Pro, A] Saqib Nazm:
The reboot indicates you didn't have a fresh install with full wipe, specially system format.

About Fb integration please check up all things related to facebook if works, send me those files via PM when you can.

Thanks

Vengeance
[Sony Ericsson Xperia Mini, Mini Pro, Xperia Pro, A] abcde25:
Link

Link? For Ray
[Sony Ericsson Xperia Mini, Mini Pro, Xperia Pro, A] chiyaanchinnu:
There is something called Google, you can take its help when you can't find something. ;) Don't take it serious, I'm just kidding. Find the link below:

Vengeance-Kernel_1.32

PS: This is a old version of the kernel. AFAIK, he stopped working on the Xperia Ray version of the kernel.

Original Thread: Link

Say thanks by pressing THANKS button to whoever helped you. Nice time modding, cheers.

Peace

Chiyaanchinnu.
[Sony Ericsson Xperia Mini, Mini Pro, Xperia Pro, A] smokerman:
even kidding i never recommend a user to use google for kernel or FTF..why?

i remember when i started on android i was curious on doing flashes,drivers etc..noobies questions,and i made a error..i used google to find a FTF to flash on my phone (LWW)..someone uploaded a ftf with same name i was looking for and it was for other phone..result..i bricked my phone..touchscreen dea

d..so i take that very serious now..dont use google..look here on xda,or ask like you did..better safe then sorry.:good:

video review HD:

[YOUTUBE]JmiSpRIbKzw[/YOUTUBE]

one of the best ICS i ever seen.:good:
[Sony Ericsson Xperia Mini, Mini Pro, Xperia Pro, A] XDynamite:
Hi, I'm trying this rom and I've found it very good. But sometimes I have a problem with this error: android.process.acore has stopped to work (or something similar). It happens when I try to uninstall apps or when I use Link2SD.
[Sony Ericsson Xperia Mini, Mini Pro, Xperia Pro, A] Saqib Nazm:
That's a problem related to semcphone, but that won't hurt in any way, I will fix it in the coming release
[Sony Ericsson Xperia Mini, Mini Pro, Xperia Pro, A] JpDany:
Is it possible to add CRT animation to the Rom?? I do miss it a lot..
[Sony Ericsson Xperia Mini, Mini Pro, Xperia Pro, A] ansarijavid:
Best ROM I've ever installed on my phone.
[Sony Ericsson Xperia Mini, Mini Pro, Xperia Pro, A] JpDany:
Why does the apps exit without notice, like force closing?? Irritates a lot.... Any chance of fixing it?
[Sony Ericsson Xperia Mini, Mini Pro, Xperia Pro, A] Ayush Singh:
Iridescent Zed has been updated to v3 :)

Changelog:

Download Link :

(perform full wipe from instructions)

Screenshots:
[Sony Ericsson Xperia Mini, Mini Pro, Xperia Pro, A] sriharsha2172:
Well, You guys never let my Xperia die...Thanks a lot...looks cool..will try very soon

---------- Post added at 11:35 PM ---------- Previous post was at 11:32 PM ----------

Also could you recommend battery efficient Kernel for this rom?
[Sony Ericsson Xperia Mini, Mini Pro, Xperia Pro, A] nedunilavan:
Try CTCaer Kernel v2.8.
[Sony Ericsson Xperia Mini, Mini Pro, Xperia Pro, A] NazS!:
VDS for battery, CTCaer for performance, Lupus - Balanced.
[Sony Ericsson Xperia Mini, Mini Pro, Xperia Pro, A] seamo123:
305MB? That's got to be too big to run properly on a Ray's limited internal memory, surely? Even at 200MB I'd still be considering it a tad on the heavy side.

Why so large?
[Sony Ericsson Xperia Mini, Mini Pro, Xperia Pro, A] sriharsha2172:
Since it is a Aroma Installer, We may have a lot of features stuffed in which we need not install...
[Sony Ericsson Xperia Mini, Mini Pro, Xperia Pro, A] seamo123:
Aha, I see. :)
[Sony Ericsson Xperia Mini, Mini Pro, Xperia Pro, A] cing229:
Flashed V3, battery always show 100%, using VDS 1.4+uv kernel
[Sony Ericsson Xperia Mini, Mini Pro, Xperia Pro, A] Dekill93:
a very good rom and stable ... hmmm why background notification bbm and wifi ap is not the same? how do I change it and I want to change the color battery percentage to white, if you can help?

look my SS

Device : Sony Xperia Ray ST18i

Rom : Iridescent_ Zed_III

Kernel : LuPuS_urushi_Stock-iCsv8-full
[Sony Ericsson Xperia Mini, Mini Pro, Xperia Pro, A] NazS!:
Switch to Lupus Kernel, then turn on the device. Later, try to flash VDS if really needed.
[Sony Ericsson Xperia Mini, Mini Pro, Xperia Pro, A] cing229:
Problem fixed. Thanks! :cool:
[Sony Ericsson Xperia Mini, Mini Pro, Xperia Pro, A] BloodEdge:
hey bro can you just add the old quicksetting back, the torch one, I really like that :)

and your Xperia Z1 Honami ROM
[Sony Ericsson Xperia Mini, Mini Pro, Xperia Pro, A] JpDany:
I get random reboot issues with ctc kernel v2.8 on the New version......
[Sony Ericsson Xperia Mini, Mini Pro, Xperia Pro, A] SalyczeQ:
Hello, How I can disable 360 degree rotation?
[Sony Ericsson Xperia Mini, Mini Pro, Xperia Pro, A] Dekill93:
try open settings, display, uncheck Auto rotate screen :D
[Sony Ericsson Xperia Mini, Mini Pro, Xperia Pro, A] jsoue:
got a bug, when i put a pattern when you lock the phone you got a sweet bootloop
[Sony Ericsson Xperia Mini, Mini Pro, Xperia Pro, A] Dekill93:
there maybe a slight problem in your phone ... because in my phone lock pattern goes well
[Sony Ericsson Xperia Mini, Mini Pro, Xperia Pro, A] JpDany:
My phone reboots during an ongoing call.... I don't know if it's kernel issue as I don't have access to pc.. Currently running on ctc v2.8
[Sony Ericsson Xperia Mini, Mini Pro, Xperia Pro, A] Saqib Nazm:
There's been a problem with not performing full wipe before installing the Rom, Format system is mandatory

Yes I know about the bug, I am preparing a fixed version with some more fixes+features added. cause after this update I won't be updating this Rom for long, so I want to leave it as stable as I can in this time period
[Sony Ericsson Xperia Mini, Mini Pro, Xperia Pro, A] JpDany:
I always perform full wipe before I install a new Rom.. I think I have to clear the app data from the memory card as well... BTW, then new update is awesome... Visuals are stunning and it's a good thing you locked the phone in memory.... Hope to use it again without bootloop.....
[Sony Ericsson Xperia Mini, Mini Pro, Xperia Pro, A] Saqib Nazm:
Are you on Odex? If you are then after applying a Theme Accent delete SemcGenericUxpRes.odex from system/framework and reboot device and see. Otherwise I don't think I have an idea why you are facing reboot issue
[Sony Ericsson Xperia Mini, Mini Pro, Xperia Pro, A] JpDany:
The v2 had the same issue but a complete wipe of memory card did the trick. As I don't have a pc now, I can't test it.... I'll update soon...
[Sony Ericsson Xperia Mini, Mini Pro, Xperia Pro, A] SalyczeQ:
No I mean that I want only 90°, 180° and 270° rotation but no 360° rotation, because it's very uncomfortable etc in bed :)
[Sony Ericsson Xperia Mini, Mini Pro, Xperia Pro, A] Dekill93:
oh... im sory :D
[Sony Ericsson Xperia Mini, Mini Pro, Xperia Pro, A] arthurpl:
I think you should go back to geometry lessons in your elementary school... #facepalm
[Sony Ericsson Xperia Mini, Mini Pro, Xperia Pro, A] Dekill93:
hey guys... my bluetooth error after wipe data... how to fix this ? kernel lupus

thx
[Sony Ericsson Xperia Mini, Mini Pro, Xperia Pro, A] SalyczeQ:
OMG, I know that I didn't write it correctly, but I don't know how describe my problem better.

So I have in mind, how I can block rotation when my phone is upside down.
[Sony Ericsson Xperia Mini, Mini Pro, Xperia Pro, A] JpDany:
Finally, found the cause of the error... I used to restore the backup of phone/message storage from the cwm backup. I guess that must have created junk data causing the phone app to stop responding..... Now on v3 and I'm enjoying every moment with it.... Thanx dude.... BTW, why does the home screen crash when launching app from its shortcut I'm the home screen instead of the app drawer??
[Sony Ericsson Xperia Mini, Mini Pro, Xperia Pro, A] Joakim112:
Waiting for the updated v3. Its been a while since I modify my phone. Thanks for the ROM btw.
[Sony Ericsson Xperia Mini, Mini Pro, Xperia Pro, A] JpDany:
Process system not responding error showed up......it results in heavy lag..any solution??
[Sony Ericsson Xperia Mini, Mini Pro, Xperia Pro, A] fneelav:
Does this ROM supports SWAP and Link2SD?

Thanks
[Sony Ericsson Xperia Mini, Mini Pro, Xperia Pro, A] JpDany:
I used swap scripts in v2. Link2sd works fine.. No prob
[Sony Ericsson Xperia Mini, Mini Pro, Xperia Pro, A] samuelms:
This rom now get update to zed iv
[Sony Ericsson Xperia Mini, Mini Pro, Xperia Pro, A] jimi-m:
Hallo, is it a GREAT ROM !!! But i will replace the used quick settings with quick setting from Zelly Cream ROM (i have instaled before). Is any solution for this? How do I do this? Will it works on your ROM?

THX !!!! (sorry for my english)
[Sony Ericsson Xperia Mini, Mini Pro, Xperia Pro, A] sriharsha2172:
I think the SystemUI is for MDPI devices, Is it available for HDPI?
[Sony Ericsson Xperia Mini, Mini Pro, Xperia Pro, A] JpDany:
Pin lock results in bootloop..
[Sony Ericsson Xperia Mini, Mini Pro, Xperia Pro, A] BloodEdge:
torch in quicksetting hungry too :D
[Sony Ericsson Xperia Mini, Mini Pro, Xperia Pro, A] Saqib Nazm:
Iridescent_Zed_4

Changelog:

Download Link:

Important Notes:
[Sony Ericsson Xperia Mini, Mini Pro, Xperia Pro, A] XDynamite:
Hi, I see that some graphical glitches have not been fixed, some parts are overlapped in status bar. See these two screenshots for example.
[Sony Ericsson Xperia Mini, Mini Pro, Xperia Pro, A] XDynamite:
Yes, I had read your post but I was hoping that with update IV this bug was fixed, but this wasn't. However your post with bug list was very useful.
[Sony Ericsson Xperia Mini, Mini Pro, Xperia Pro, A] XDynamite:
Another problem I found is when I try to connect two contacts in phonebook I have app fc. Maybe is there an updated version of this app without this bug?
[Sony Ericsson Xperia Mini, Mini Pro, Xperia Pro, A] isolove:
where is fixed the sms problem?still dark fonts i dark background......
[Sony Ericsson Xperia Mini, Mini Pro, Xperia Pro, A] albertomuerto:
All its perfect and congratulations, my only problem is I can´t play Mavel War of Heroes, the game go excellent until cant select my cards with that system selector arrows, any solution?
[Sony Ericsson Xperia Mini, Mini Pro, Xperia Pro, A] ansarijavid:
AROMA INSTALLER version 2.70B6

(c) 2013 by amarullz xda-developers

ROM Name : Iridescent Zed

ROM Version : Zed IV

ROM Author : Saqib Nazm & Ayush Singh

Device : Xperia 2011 (Arc/S,Pro,Neo/V,Ray

Start at : Sat Jan 5 19:04:56 1980

wrong updater binary API; expected 1 or 2, got 3

Installer Error (Status 2)

End at : Sat Jan 5 19:04:56 1980

---------------------------------------------------------

I got this error while installing version 4.

Thank you so much.

Update: I changed the kernel from CTCaer to Sirkay and the problem was solved!
[Sony Ericsson Xperia Mini, Mini Pro, Xperia Pro, A] Toni Mahmud:
pls give new link if you have for this rom
[Nexus 5 Q&A, Help & Troubleshooting] gaurav2009:
When i quickly scroll to last page of app drawer it just redraws for half a sec...similarly if i goes from last page to first page...i think it is problem with new launcher on 4.4.2...anyone facing same problem?

I made a little video showing problem..

www.youtube.com/watch?v=VKeM-dHfKek
[JASJAR, XDA Exec, MDA Pro General] StevePritchard:
A little off topic, I know, but has anybody been able to use something like this --> http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=9104458427&sspagename=ADME:L:RTQ:UK:1&rd=1 to make a copy of their Exec's O2 sim for us in another phone for situations where the exec isn't appropriate?

It would be handy to have a second phone for use when I don't want to take the Exec without having to keep swapping the sim.

Cheers,

Steve.
[JASJAR, XDA Exec, MDA Pro General] benjdc:
these wont work for the exec, because you will receive a 3g card from o2. this package looks like it will only take standard gsm sims ie 2 and 2.5g. also, i think the new sims in general are not "crackable" at this point.
[JASJAR, XDA Exec, MDA Pro General] Bonzo:
Doesn't O2 offer this as a LEGAL service?

The SIM in your phone is probably legally defined as O2 property, and they've probably not agreed to copying of their product.

If you read all of the fine print, you'll probably see some stuff about this.

But, yes: It's nice..
[JASJAR, XDA Exec, MDA Pro General] davebo:
2 sims - one number

They're working on it.

The ebay item doesn't claim to be able to actually clone a SIM card though, just backup up or consolidate if you have multiple SIMs.
[JASJAR, XDA Exec, MDA Pro General] StevePritchard:
Re: 2 sims - one number

No, but if you can select between 16 numbers to use, then surely, it's like copying 16 sims into 1? Even if I were to only copy 1 sim, if it could act as if it were that sim in another phone, then that would do the job.

Cheers,

Steve.
[JASJAR, XDA Exec, MDA Pro General] Charlie VOIP:
There is a slight problem in all of this. You cannot have to sims logged on using the same MISDN . So all that would happen is the operator would be alerted to the fact that 2 sims were trying to usre the same MISDN and you would be put into the fraud management system and the phone might be disconnected.

When people scan and clone phones they do not use the phone on standby for long periods of time they simply make a few calls and switch off. Unless they time it when the real user is logged on and tries to make a call it is unlikely to be picked up.

Also it will vconfuse the HLR in the gsm network .

So all in all onot a good idea.

Charlie
[JASJAR, XDA Exec, MDA Pro General] skoop99:
Hm? Back home in the Netherlands we used to be able to get two SIMs with the same number from our providers... The idea was, you had one in your built-in car phone, and one in your portable handset; when you got out of the car, switch that phone off, and the other one on, and it'll register the other SIM, and hey presto! You could not use both SIMs at the same time, ofcourse.
[JASJAR, XDA Exec, MDA Pro General] inspecta:
I bought one, THEN read up on the facts (doh!)

There is no de-cryption algorithm for any SIM cards supplied in the UK over the last 2-4 years. True, the old SIMs could be copied, but the v.2 system cannot.

Still, it is a nice piece of kit for reading your SIM contacts over USB, and didn't cost a fortune.

I'm actually quite pleased that SIMs are this secure, 'cos I wouldn't want them easily copyable by the bad guys.
[JASJAR, XDA Exec, MDA Pro General] Churchill:
In the Nehterlands I know that KPN and t-Mobile offer dual sims, the problem is as mentioned here already that you can not use them both at the same time. Also if you have 3G sim the second sim you get is not 3G. those are the rules by KPN.

I used to live in Israel and there Orange gives out dua sims where you can keep both phones on. On the incoming call both phones ring at the same time and you can decide which to pick up. The SMS trafic thought goes to the phone which was turned on first. The way they are doing this is by giving both sims an extra GHOST number which used to start with a Zero. then what they did was simply forward the calls between two sims. They had a huge blunder though: Forwarding officially costs money but in this case it has to be free, so they by mistake on their first couple of bill specifications posted the forwarding calls with Zero as charge, thus I was able to know what are the ghost numbers and call between the phones completely for free. It did mean that the you could call the the ghost numbers only from those 2 phones and not any other phone, kind of internal cirquit. So we enjoyed it very much since my wife and me just used those two phones and comunications between these two was free of charge.

So as you see technicaly it is possible to make both phones ring at the same time....
[Galaxy Note II Q&A, Help & Troubleshooting] dual-booter:
Rooted Note II. When trying to flash a new ROM from the external SD, get a persistent error "error in zip", "installation aborted", "status 7". Tried various recoveries, to no avail.

The various ROM zips are perfectly openable from a regular file explorer, yet I can't finish the installation from a recovery. What's going on, I have never had this kind of problem before.

Amy insight would be really appreciated.
[Galaxy Note II Q&A, Help & Troubleshooting] cabessius:
The "status 7" error usually happens if you use an outdated recovery.

Did you try with latest TWRP or CWM?
[Galaxy Note II Q&A, Help & Troubleshooting] gsoros:
which recovery are you using?
[Galaxy Note II Q&A, Help & Troubleshooting] dual-booter:
TWRP 2.5.0.1 I believe
[Galaxy Note II Q&A, Help & Troubleshooting] exceptionalkhan:
Head Over here to solve the status 7 error.

http://xdaforums.com/showthread.php?t=2302599
[Nexus 4 Q&A, Help & Troubleshooting] AntiNSA:
I have purchase a great Nexus 4 in China at a 2nd Hnd phone market that worked great for a month or so. I purchased it, it was unlocked and running 4.2, which Through OTA was updated until reaching 4.4.2.

All was well. Everything worked like a dream. Decided I needed root one day, and tried a toolkit. Don’t know how but I wound up in a bootloop/soft brick at the circles.

Factory reset didn’t work. Toolkit original flashing original rom didn’t work.

So, here are the processes I have gone through to get this working.

1) Flashed every rom from the factory rom s listed on googles dev site through fastboot, and also by runing the included bat.

2) Using the newest Android SDK for 64 bit wind 8.1. Have used both the generic driver, pda driver and googles sdk driver.

3) Have sideloaded ota updates from the ota list

4) Have manually used fastboot in every way possible that I know about…

5) Have tried custom > 4.3 roms

6) Have tried twrp & cym

7) Have wiped cache, factory reset, lock/unlock

8) Have tried rebooting in safe mode and removing the -w when flashing system

9) All I can get working is 4.3 when I flash the .54 radio from the JDQ39E rom

So some questions:

1) If the memory on the phone is bad, why do the roms under 4.3 work?

2) Is this an Indian rom?

3) Is this a Korean rom?

4) You can notice there are many different ota versions depending on the rom you are coming from. So I am venturing to say that these roms are not so one for all globally as people think.

5) I always seem to have a korean IME on the phone on a fresh image flash

6) When using the JDQ39E rom, there is an Indian IME

7) I have been unable to find any factory images or rom designations for India or Korea,

8) I did find a thread on here where someone created a cwm flashable zip of the JDQ39E rom it works well, but unable to sideload ota > 4.3

I have hammered this topic for 4 days and nights not hardly sleeping. I am out of Ideas. Its real hard to get nexus 4 in China for me and I really liked the phone. I hate being stuck @ 4.3. I would be so greatful If anyone could help me overcome this challenge.
[Nook Touch General] thirumalkumaran:
Hi All,

I charged my NST yesterday (Near the Plasma TV), Upon Charge completion I noticed some set of lines turned inverted (Black appears instead of white and Vice-Versa)

I had opened the NST, removed the battery and connected again.. still it is inverted. Did a full factory reset still inverted...

Any help guys!!!
[Nook Touch General] genoxygen:
The same happened to my previous Nook. I had to make use of the warranty, I got a replacement.
[Sony Xperia Z Ultra] abuihsan:
Hi all.. I just totally lost radio signal after reverting 4.3 to 4.2.2.

Tried everything like flashing .532 ftf, restoring nand backups (stock, cm10.2, omni 4.4) even factory reset with no result.

The signal bars did exist but in grey with red 'x' over the bars.

Well the solution is re-flash with FlashTool the 14.2.A.0.290 FTF and the radio signal back to normal.

EDIT: Screenshoot attached.
[Sony Xperia Z Ultra] stiggy2012:
Interesting info. Others have also reported that downgrade to .532 removed their IMEI too.

I wonder, has anyone been able to successfully revert from .590 (4.3) once upgraded?
[Sony Xperia Z Ultra] abuihsan:
I attached the SS on the first post..

Also I noticed that baterry bar sometimes drop fast, also when connected to charger it grow rapidly : (

Still no solution to get out from 4.3 tough, I tried these:

from 4.3 >flash 532 FTF, signal gone

from 4.3 restoring stock .257 nandroid backup > signal gone

from 4.3 >flash CM10.2 > signal gone
[Sony Xperia Z Ultra] LordManhattan:
Is this solved? If so, please share what you did so other people with the same issue can get help.
[Sony Xperia Z Ultra] YrrchSebor:
i went from from .290 to a CM 10.2 nandroid and lost radio signal... i think it is a baseband incompatibiity, but i restored everything from a .257 FTF except system and kernel, and it was fine after that. i don't think i have lost IMEI at any time tho
[Sony Xperia Z Ultra] abuihsan:
Restoring everything from .257 FTF from .290? Still stuck with 4.3 here : p

Only to get the radio signal back is solved. And to escape from .290 (4.3) > unsolved yet (will try the above method.. still nandroiding)

EDIT:

while on .290 (4.3) I did these:

Stage 1:

I make .290 nandorid backup with this kernel (v5)

http://xdaforums.com/showthread.php?t=2426736

enter CWM recovery (by pressing volume-up while purple LED sign), go to 'advance' and hit 'turn-off'

Stage 2:

FashTool .257 FTF with:

[Wipe Column]

APPSLOG = checked

CHACHE = checked

DATA = unchecked

[Exclude Column]

KERNEL = checked

SYSTEM = checked

others = unchecked

this will make the phone bootlooping with CWM, enter CWM recovery (by pressing volume-up while purple LED sign), go to 'advance' and hit 'turn-off'

Stage 3:

FashTool .257 FTF with:

[Wipe Column]

APPSLOG = unchecked

CHACHE = unchecked

DATA = unchecked

[Exclude Column]

KERNEL = unchecked

SYSTEM = unchecked

others = checked

(this process took longer than stage 2 above)

after done, I reflash this kernel (v5)

http://xdaforums.com/showthread.php?t=2426736

then enter CWM and restore .257 nandroid backup..

Now I am on rooted .257 with fully working radio signal : )

Edit #2:

From rooted 257 I flash Central Europe 290 FTF back (wipe ALL and exclude NOTHING) everything runs smooth.

Then from 290 I flashed back to Europe 257 FTF (wipe ALL and exclude NOTHING), no signal lost and IMEI still there.

Back again to 290, I tried both central Europe (CE) and Singapore (SG) FTF, no more problem.