yashsingh1/xdaforums huggingface dataset:
[Sony Xperia XZ2 Compact Questions & Answers] viktor1983:
Thanks, I'll give it a try today and ask them to replace sim card. Hopefully it will solve the other appearance of this issue also: whenever I have full bars and talking (usually late night driving home to parents, in a well-covered area), audio quality degrades in seconds - at least on my side - and other party is not able hear anything I say. After disconnecting - if I'm able to do so, and phone app does not get stuck with "call disconnecting" message - I'm not able to make/receive new calls, as only the outline appears of signal strength bars. After restart everything works perfectly. Strange, isn't it? :)
[Sony Xperia XZ2 Compact Questions & Answers] landsome:
Ironically - or maybe not - I am not that far away. I am on Orange Romania. When I search for networks I get essentially the same picture -

Thanks, I will try the SIM trick as well, maybe it helps. I may even go as far as jumping carriers, in fact.
[Sony Xperia XZ2 Compact Questions & Answers] viktor1983:
Got my sim card replaced, now waiting for the issue to pop up again. (or hopefully not) Actually the guy at carrier said my "white" simcard (about a year old) was a problematic one, replaced it with a new. I don't know if this could be true, but hopefully it'll solve the problem.
[Sony Xperia XZ2 Compact Questions & Answers] viktor1983:
It seems that replacing the sim card solved the issue, thanks for the hint! I would have never ever thought that a sim card issue may cause such a problem.
[Sony Xperia XZ2 Compact Questions & Answers] cryss83:
I have exactly the same issue and have already a new sim, which doesn´t do the trick for me....any other ideas how to solve this?

no VoLTE or anything like that. T-mobile as carrier
[Sony Xperia XZ2 Compact Questions & Answers] landsome:
No longer have this problem with recent firmwares. The sim change did not solve the problem for me.
[Sony Xperia XZ2 Compact Questions & Answers] cryss83:
Thank you for the feedback.

With the recent firmware you mean 52.0.A.8.50 on android9? Do you use stock rom or a custom rom?
[Sony Xperia XZ2 Compact Questions & Answers] landsome:
No, it's the past 4 or 5 firmwares.
[Sony Xperia XZ2 Compact Questions & Answers] landsome:
What an irony! After updating to the latest fw some 2-3 days ago, it's happened again, the first time in some 4 months.
[Sony Xperia XZ2 Compact Questions & Answers] cryss83:
Nooo... I just got my replacement phone today and so i installed all the latest firmwares.... I still have high hopes i won't be affected again.

Has anyone any idea how many phones are affected this way... Can't be all of them otherwise there would have been a flood of threads about that.

Maybe some prior models of this series...
[Sony Xperia XZ2 Compact Questions & Answers] MartinX3:
Did you test different firmware regions?

Maybe your mobile network provider and the baseband aren't compatible (bug).

And did you report Sony that the bug is in the newest firmware?
[Sony Xperia XZ2 Compact Questions & Answers] cryss83:
No i've just used the original settings since i am still in warranty time :)

But that's why i've asked before if the others were experiencing this issue only with their stock or even with custom roms / fw.
[Sony Xperia XZ2 Compact Questions & Answers] MartinX3:
Changing regions doesn't need an unlocked bootloader. :)
[Sony Xperia XZ2 Compact Questions & Answers] cryss83:
For that, do you mean to change the settings in the play store or which settings are you referring to?
[Sony Xperia XZ2 Compact Questions & Answers] MartinX3:
Just use xperifirm and newflasher to apply a different region.

But remove the userdata.sin if you don't want a full wipe.
[Sony Xperia XZ2 Compact Questions & Answers] cryss83:
Thank you... This one i didn't know... :)
[Sony Xperia XZ2 Compact Questions & Answers] gregy74:
Exactly same problems. I had before this problems, and I still have. New sim card didn't change anything. Also sent phone on service didn't change anything. Very good phone, but I was thinking that mobile phone is for making calls :) After updating phone 5-6 times with updated firmwares, still same problem. But it is very interesting, this problem are present and then just go away for maybe 1-2 months and then again and again,...
[Sony Xperia XZ2 Compact Questions & Answers] cryss83:
I have changed my phone and got a brand new... Still the same issue.

2 different sim cards.... Same result.

Really annoying.
[Sony Xperia XZ2 Compact Questions & Answers] landsome:
Do you have a dead spot in the area(s) where this happens?
[Sony Xperia XZ2 Compact Questions & Answers] cryss83:
Nope... As soon as i restart the phone, the connection is back on track... Close to the window in my house it's 4G/LTE, inside the house it's dropping down to Edge... But like i said... When i have the issues, i have no cell reception until i restart the phone...then everything is back to normal.

I recently set the region to europe with the same result... Just yesterday i flashed it to france (even though i'm in germany) and until now: no issues... Keeping my fingers crossed...

Edit: tried "customized europe" and "france" as regions... Same result :(

Next step will be custom rom and the hope that this bug will we gone.
[Sony Xperia XZ2 Compact Questions & Answers] landsome:
I have the same symptoms exactly (though much less now). But that is also around a spot where LTE is borderline (some - 110db). My guess is it's related to this weak 4G signal.
[Sony Xperia XZ2 Compact Questions & Answers] cryss83:
have you tried a custom rom already? or anyone else who got this issue? would be good to know if it is resolved by flashing a custom rom.

edit: i just saw that via xperifirm there is a new firmware available for germany (52.0.a.8.83/r2b) i´m gonna give that a try now and see what happens.

Edit2: same problem as before..

For me, it seems like the mobile phone is not able to switch back to another network (edge for example) if the reception on LTE / 3G was too bad... It just stays that way with no reception.

In may case this happens mostly when i'm at home... And after about 1 or 2 days.
[Sony Xperia XZ2 Compact Questions & Answers] landsome:
In my case it used to happen every 2-3 days until some 5 months ago, almost always at home where I have an almost dead spot for LTE. Then it disappeared completely for some 4-5 months after an update. Then reemerged with latest fw, but only happened twice in one month, and once it was - curiously - only for data, not voice (go figure!). So no intention to get custom fw. I have a widget (Cell Widget) that tells me at all time the status of my network.
[Sony Xperia XZ2 Compact Questions & Answers] cryss83:
Once or twice a month would be alright for me.

I really need to get this fixed as it is really annoying and i really wonder what strange circumstances have to come together for this to happen... If it was a regular bug more people would complain about it... But it has to do with provider signal strengths ans such things.... Like i said before: i had this with another xz2 compact as well i've returned that because i thought it was defective.

Edit: strangely enough: as it seems this issue seems to have stopped or has dropped to a minimum...

I don't know why but within the past few days this issue has stopped to exist.

I haven't changed anything lately so it is either cell carrier sided or somehow otherwise unexplainable.. But i am happy for now and hopefully will be in the future.
[Sony Xperia XZ2 Compact Questions & Answers] PlaTina512:
Had anyone any luck with this? I am having the same issue. My provider is Telekom Hungary. It is really annoying.
[Sony Xperia XZ2 Compact Questions & Answers] cryss83:
Nope :(

All i can say is that it is an issue with switching between different networks (2G/3G/4G)

I'm on holidays in france now where i'm constantly at 4G+ and i don't have this issue at all!

Even though the reception is not ideal, i'm still on 4G+ but somehow at home if the signal is going a little weaker i'm switched back to a slower network and THEN the problem occurs again.

Edit:

For me it would be interesting to know if someone had this issue first, then used a custom rom and the issued was gone... Any chance anyone experienced that? If yes... Which rom was used?
[Sony Xperia XZ2 Compact Questions & Answers] MartinX3:
Sometimes no network or weird switching between 2g 3g 4g but having it since my nexus 6 years ago

Either Qualcomm ****ed the modems or the provider in germany are ****
[Sony Xperia XZ2 Compact Questions & Answers] cryss83:
True that... I am on German T-mobile/Congstar with this issue.. No idea about the other providers though
[Sony Xperia XZ2 Compact Questions & Answers] MartinX3:
O2 here, eplus in the past

If I set my device to LTE(+) only (omnirom), it is fine (but no calls if no VoLTE / VoWIFI activated)
[Sony Xperia XZ2 Compact Questions & Answers] cryss83:
Ok, so that means it is not something you can fix by switching to a custom rom... Because that was my hope... :(
[Sony Xperia XZ2 Compact Questions & Answers] MartinX3:
Even if it is a bug in the modem, this is a closed source hardware piece where only Qualcomm can do bugfixes. :(
[Sony Xperia XZ2 Compact Questions & Answers] cryss83:
I just wonder why so few people complain about this issue?! If you read comments on amazon.de for example most of the users seem happy and content don't seem to have this issue.

Like i mentioned a few posts back... Maybe there are different versions? But i have tried 3 different xz2 compact and all of them were affected
[Sony Xperia XZ2 Compact Questions & Answers] MartinX3:
Germany hasn't a good mobile infrastructures on an european index. :)

https://t3n.de/news/schnellsten-lte-netze-europa-deutschland-2018-957520/
[Sony Xperia XZ2 Compact Questions & Answers] landsome:
What amazes me is that both my old XZ1C and my wife's XZ1C work just fine in the same space where my XZ2C stumbles occasionally. (We are on different providers...)

Are the modems even different on the two phones?
[Sony Xperia XZ2 Compact Questions & Answers] MartinX3:
Try the same simcard, the newest firmware version and if possible the same firmware region.
[Sony Xperia XZ2 Compact Questions & Answers] landsome:
That is exactly what I did. Never happened on the XZ1c.
[Sony Xperia XZ2 Compact Questions & Answers] cryss83:
So i changed my carrier from congstar (t-mobile) to vodafone germany... Still the same issue.... Again:

In spain and france via Roaming i had no issues at all... But if i recall correctly: i have always been on LTE in spain and no switching to other bands.

Sony forums: no one is responding :(

Btw: is it the dual-sim version only or are you having issues with the single-sim version as well?

I have the dual-sim :(
[Sony Xperia XZ2 Compact Questions & Answers] landsome:
Yep, Sony's disinterest has prompted me to switch to a Pixel 3, even if the problem occurred very rarely in my case. (That and the sheer temptation of it.)

I badly miss the Sony's size and in-hand feel - but a smoother experience [Pie has been occasionally laggy on the XZ2c for me, worse than on my retired XZ1c], the camera's reliability, and the peace of mind that I can always receive a phone call compensate for that.

I have the dual sim too.
[Sony Xperia XZ2 Compact Questions & Answers] cryss83:
Thanks for the input.

I've just ordered a s9, since there is no progress visible at all...

It is really a bummer that sony cares so less about stuff like customers' service :(
[Sony Xperia XZ2 Compact Questions & Answers] MartinX3:
I wrote an email to the Sony service because the bluetooth music became crappy on my thinkpad T440p Bluetooth version.

They answered me and fixed it on the next no the update.
[Sony Xperia XZ2 Compact Questions & Answers] cryss83:
Nevertheless, from what i have seen in the sony forums: they seem to care little (until otherwise noted)
[Sony Xperia XZ2 Compact Questions & Answers] landsome:
Truth be told, I am not sure Sony is worse than other major manufacturers in this respect (one exception perhaps is OnePlus). It's just that this has stayed 'unfixed' (although in my experience it somewhat improved in time) for so long. Time to move on - with substantial regrets, in my case.

(I would have reverted to the XZ1c, the last true flagship compact, but I have a hard time dealing with the shape -esp. the many corners piercing through my jeans' pockets -, the absence of night light [which they explicitly abandoned] and workarounds, and the very average camera.)
[Sony Xperia XZ2 Compact Questions & Answers] cryss83:
Even though i bought a S9, i have sent my xz2c to the sony service and today i got my device back..

So first of all: i described the flaws i had plus my rarely wifi drops.... So they sent it back and repaired it "according to the description of errors". Obviously they have changed the PCB which also led to a new/different IMEI than before... So now i'm testing and see how that works :)

Keep your fingers crossed!

Edit: no luck... Still the same f*.... Issue....
[Sony Xperia XZ2 Compact Questions & Answers] landsome:
Sorry to heart that. It's probably either a design flaw or a software problem that they cannot get to the bottom of. Pretty disappointing...
[Sony Xperia XZ2 Compact Questions & Answers] cryss83:
Yeah, it really is... But obviously it is not that severe because otherwise more people would complain about it.

I'm giving it a last chance by ordering the single-sim version and hoping for a different result... It not, well, then it will be the S9 (which is also a bit disappointing, but that's another story)
[Sony Xperia XZ2 Compact Questions & Answers] MartinX3:
Such bugs most people doesn't have are very weird.

If you want you can flash my omnirom custom ROM.

It is stable.

We just miss VoLTE (should come later after Q 4.14 became stable enough)

And a camera upgrade (comes with the Q 4.14 development)
[Sony Xperia XZ2 Compact Questions & Answers] cryss83:
Define stable please :) did you have this issue and the bug is fixed in your customRom?

Besides this bug, i had no issue with tge xz2c...
[Sony Xperia XZ2 Compact Questions & Answers] MartinX3:
It isn't based on the sony stock rom, it is based on the Sony Open Devices Project

Most parts are self developed by SODP, so the changes are high that this issue won't occur there.

But in fact I never heard about this issue except in this thread. :)
[Sony Xperia XZ2 Compact Questions & Answers] cryss83:
Good to know, thank you for the info. Is it compatible with single-sim version as well?

Outside this forum:

https://forum.congstar.de/Handy-Tablets/Handys-Tablets/60932-Kein-Empfang-xz2-Compact
[Sony Xperia XZ2 Compact Questions & Answers] MartinX3:
These are compiled single sim versions which get switched to dual sim with a patch flashed in twrp. :)

(My phone is dual sim)
[Sony Xperia XZ2 Compact Questions & Answers] cryss83:
Wonderful!

My xz2c (single) should arrive tuesday/wednesday... I'll have a look at stock first to see if "my" error still occurs and then i'll give your rom a go!

Thanks a lot!
[Sony Xperia XZ2 Compact Questions & Answers] cryss83:
So, to give you a heads up:

I had no issues with the XZ2compact (single-sim) at all!! It seems as if the dual sim and single sim differ in a way when it comes to the modem.

So if you want to keep this good phone, go single sim!
[Sony Xperia XZ2 Compact Questions & Answers] landsome:
Thanks! That is so bizarre...
[Sony Xperia XZ2 Compact Questions & Answers] qj4:
I have a similar issue with my single-sim phone, except it's not occasional but all the time that I can't make or receive calls. If I try to call it'll disconnect after a short while without ever ringing. Forcing LTE-only makes it disconnect immediately after hitting dial. Data and text work fine.

Tried with VoLTE on/off, wifi on/off, data on/off, flashing Android M/P/Q, but no luck. I've confirmed it's not the SIM. Seems like a hardware problem? I'm at a loss.
[Sony Xperia XZ2 Compact Questions & Answers] mirhl:
Your carrier hasn't volte enabled/whitelisted on his side then?
[Sony Xperia XZ2 Compact Questions & Answers] landsome:
Any change on Android 10?
[Sony Xperia XZ2 Compact Questions & Answers] nicuaab:
I have the same problem and unfortunately the update to Android 10 did not solve it
[Sony Xperia XZ2 Compact Questions & Answers] wombatch:
In case anyone is interested, I got a new "out of the box" xz2c and looked at the measured signal level from a fixed point in my basement, the XZ2C showed -134db/nothing and the Z5C showed -110db I don't think I have a particularly good z5c they just had a better aerial or the xz2c has a bad one, probably explains the end of compact models and maybe the problems experienced here.
[Sony Xperia XZ2 Compact Questions & Answers] landsome:
Instead of discontinuing the line they could have made it more like the z5c... Anyways, the Pixel 6 has awful reception.
[Asus ZenFone Max Pro M1  Questions & Answers] smsmathan:
pls kindy anyone upload the official kernal zip ..
[OnePlus 6T  Questions & Answers] adrian.w:
Hello guys. I have problem with my Oneplus 6t. Today I wanted to root my phone but I encountered a problem. I will try to explain simple.

1. I tried to do it using the same tutorial -------> https://www.youtube.com/watch?v=Es80k627kTc //// https://www.xda-developers.com/official-twrp-oneplus-6-huawei-p20-pro/ after uploading the files twrp and magisk on my phone and launching twrp (3:53) and going to the installation tab, I do not have any files that I've uploaded earlier from the computer. Files in this tab are as if encrypted. Something like

2h8P9lGY8I1A884LMsBjaA

2u+nb0LdBNopRSa5LehsvB

75aTrCvYkWG+R+lrcRz6WA

DcwYkwSKokq8Rm5lYc4YYC

In systems, the computer also sees the same characters in place, there is no possibility of uploading anything. I tried to erase the system and then upload files to the phone. TWRP will then notice the files normally, but you can not install them, crashes the error and after rebooting the phone stands in fastboot. However, I was able to restore the entire system back, but I'm still at the 3.53 tutorial stage.

At this link is a photo of the phone's system folder after connecting it to the computer and launching the twrp from the laptop

https://www.fotosik.pl/zdjecie/usun/0r0~nR_1RrbrxeX9m0crzLaMr_ZOpH

I apologize for the language but I use mostly google translate.Does anyone know what can be done with this? I will add that after removing the system there is still no twrp on the phone
[OnePlus 6T  Questions & Answers] sssarg:
Have you tried reading the actual 6T threads on the matter, and using 6T specific twrp?
[OnePlus 6T  Questions & Answers] domnic79:
You need to follow this guide https://xdaforums.com/oneplus-6t/development/recovery-unofficial-twrp-touch-recovery-t3861482
[OnePlus 6T  Questions & Answers] adrian.w:
guys, thank you very much everything works as it should: D I've been sitting here for about four hours.
[HTC U Ultra Questions & Answers] abhishek018:
Hey guys,

So here it goes. Phone was getting really slow, so I did a factory reset on it. Worked pretty fine for a few days and then suddenly yesterday phone started freezing while starting. Just get to see the HTC Logo but thats it. I have not unlocked the bootloader since I never felt the need to root my phone.

I have absolutely ZERO experience in rooting a phone or flashing the ROM. Please provide me a dummy's guide to fix the darn thing and get it running back up.

P.S:- I have the 4GB/64GB version
[HTC U Ultra Questions & Answers] minhnewpro:
Can you boot to download mode
[HTC U Ultra Questions & Answers] davi133:
hi,

press and hold volume down + power key until the phone start into fastboot mode

then chose with volume up/down the "reboot to bootloader" press power button, then a white screen with colorfull font appers

then chose "boot recovery mode" in the same way as before and press power button, then a screen with a red exclamtion mark appears,

now press and hold power button + press volume up key several times, a screen appers,

now chose "WIPE DATA/FACTORY RESET" and press power key,

after this has finished maybe there is a reboot option, chose it and press power button

this should bring your phone back to life

if not, or your phone makes noise or huanging, press and hold volume down + power key until the phone goes into fastboot there you can power down

if your phone does not boot normal then your phone need to send into service...

davi133 :cowboy:
[8525, TyTN, MDA Vario II, JasJam General] Ray_jai:
Hi, I just bought this phone off craiglist and the sell isn't picking up my calls anymore.

She sold me a corrupt radio rom phone and i can't seem to fix it.

I read all the guides and spent the whole night trying to fix it.

after failing many times, and desperate for help, I'm starting a new thread.

What i know:

this problem started when i tried to unlock my phone with the unlocker v3. the phone kept stopping at 0% and none of the recovery steps work.

I tried hard SPL and it worked. and OS only rom works.

so I have a type 1A brick.

My phone says:

Herm100

IPL-1.04

HERM100

SPL-2.10.Olipro

NO GSM on OS start up.

I tried this fix:

but the problem is, my MTTY, does not show USB, it says CMD, not matter how many times i press enter.

METHOD 1

Disable activesync on your computer by right click on activesync icon -> connection settings -> uncheck "allow USB connections".

Put your Hermes in bootloader mode

Connect device to computer using USB cable.

Open mtty.exe and select USB port, then connect.

Hit enter twice, you will see the "USB>" prompt.

Type the following commands (do not copy paste!!!)

USB> password BsaD5SeoA

USB> set 1e 1

USB> erase a0040000 c80000

USB> erase a0cc0000 c80000

USB> erase a1940000 640000

USB> set 1e 0

after i do all this, I press the ok (the one of the left side) button and power button and reset to get back into bootloader.

then i run the ROMUpdateUtility.exe from Unlocker V3

and i still get 0%. whats going on?

any help would be great.

I don't know what i'm doing wrong, I read people are getting it to work with this method, but it's not working for me.

Thanks

Edit:

can somone tell me thats this means in mtty?

Cmd>

Cmd>info 2

HTCSSuperCIDÔéÜHTCE

Cmd>task 32

Level = 0

Cmd>rtask a

Command error !!!

Cmd>rtask a

Command error !!!

Cmd>rtask b

Command error !!!

Cmd>rtask 0

Command error !!!

Cmd>rtask 1

Command error !!!

Cmd>rtask 3

Command error !!!

Cmd>rtask 4

Command error !!!

Cmd>info 2

HTCSSuperCIDÔéÜHTCE

Cmd>

that does this mean?
[8525, TyTN, MDA Vario II, JasJam General] Ray_jai:
Ok, I was able to flash a Rom with Radio rom on it,

I tried to flash this rom on my phone

http://xdaforums.com/showthread.php?t=371266

and it fails at 0%, then i use a att rom and flashing it to the phone works!

I got my radio rom back, but I only see the radio when there is no sim card inside.

But as soon as i put in a sim card, NO GSM comes back.

does anyone know why?

thanks in advance!
[8525, TyTN, MDA Vario II, JasJam General] XtreMe_G:
that rom u tried to flash is not made for the hermes
[8525, TyTN, MDA Vario II, JasJam General] Ray_jai:
Yes, i know, But i read from barton on another thread, he used a Hima rom and it worked.

so it worked for me too. it doesn't really get to flash it. It stops at 0%.

I also flash it with active sync.

I just need to get the radio working with Sim again now.

maybe other should try what i did too.
[8525, TyTN, MDA Vario II, JasJam General] XtreMe_G:
oh oh.....its coming back to me now......installing the hima rom reformats the radio sector or something like that. i remember reading about this some time ago.....and i think pof managed to replicate that process, so you dont actually have to install the hima rom. the link is in the wiki somewhere
[8525, TyTN, MDA Vario II, JasJam General] Ray_jai:
I tried most of the stuff on the wiki none of them work, but can you point me to it anyway? maybe i missed it.

thanks.

edit:

i tried fixing it using unlock version V3a, but it screws up my radio again.

going to try V2a next.
[8525, TyTN, MDA Vario II, JasJam General] XtreMe_G:
http://wiki.xda-developers.com/index.php?pagename=Hermes_UpgradeProblems#problem5

here's the link, but it looks like you already tried it. see the links at the bottom of that section, the "related forum threads"