yashsingh1/xdaforums huggingface dataset:
[Xperia Z Q&A, Help & Troubleshooting] swrajjoshi:
This is exactly the problem I am facing - I have stock .434 (rooted) build. For reasons unknown to me, my phone keeps dropping the data signal. My cell connections are strong but it keeps losing 3g connection. Only way to get it back is - Airplane mode - lock phone - wait a min - unlock phone - turn off airplane mode. :p

This is a big problem for me. I am seriously considering replacing the phone or switching to different ROM.:rolleyes:
[Xperia Z Q&A, Help & Troubleshooting] SuperTraxer:
Same Kind of Issues with .253

Since the topic is inactive for two weeks, I would like to add that the .253 build doesn't really solve the problem.

Even though I have not noticed problems for making calls, the mobile data connection does not work way too often. Usually, while on the walk, I have internet connection issues half of the time. (I am sure it is not the carreer, I am using the same for years, no problem). The connection drops and comes back randomly. Very very annoying. It's worse noting, in most cases the phone thinks it has the connection (moving arrows around the 3g symbol), but apps continuously report connection issues, same for the browsers.

About the wi-fi, the signal is clearly very poor. Regular drops occur while in good conditions. Not so long ago, my previous phone - HTC Incredible S had never lost the wi-fi connection while at home. Same place, same rooter.

Sony, you are disappointing! I start considering selling the phone!

N.B. I have not rooted the phone or unlocked the loader.
[Xperia Z Q&A, Help & Troubleshooting] djnino4style:
I too have the same problem.

Mine is original and stock.

I'm Italian!
[Xperia Z Q&A, Help & Troubleshooting] swrajjoshi:
I am on. 253 with same problem. I changed config in Stamina mode which didn't solve my problem but reduced the frequency of data connection by a lot.

Stamina mode -> turn it on > Activation > reduce the % to 15 % > reboot

After reboot turn off the stamina mode and reboot again.

Good luck :)

Swraj
[Xperia Z Q&A, Help & Troubleshooting] SuperTraxer:
Thanks, will try!
[Xperia Z Q&A, Help & Troubleshooting] belveder69:
I'm with Optus in Australia and I have the same problem, I can connect to 2g fine but have no 3g, I know it's not the area because the Samsung phones have no trouble
[Xperia Z Q&A, Help & Troubleshooting] dopeee:
Strange, I didnt have these issues while on 434. but ive been on 253 for about a week and I've been getting this frequently. I can never connect to 3g, only LTE. I have to just reconfigure / redownload internet and mms settings for it to work again.

i stopped using stamina mode thinking it was that, it seems to be less frequent but still happens. very annoying!
[Xperia Z Q&A, Help & Troubleshooting] hiddenfr:
I didn't have a signal problem, but my cellular network is unable to connect properly to network, especially to connect the Play Store, it's always show error while downloading (something like code 903 and etc.). Tried to move my SIM to another Android phones, Play Store works normal, the network works like a charm too.

It's so strange, didn't sure this problem caused by hardware/software issue, or just my operator is sucks on Xperia Z.
[Xperia Z Q&A, Help & Troubleshooting] Mythusme:
I try this method and it work for me

I'm on .253 stock using gsm network, I don't know if it work on other network

delete this line on build.prop

persist.ro.ril.sms_sync_sending=1

ro.telephony.default_network=9

I found this when I compared build.prop from .350 .434 & .253, network is ok on .350 but on .434 & .253 there's a problem.

Now I have no network signal issue.

Good luck.
[Xperia Z Q&A, Help & Troubleshooting] resub:
Can’t connect to this network right now. Try again later.

Hi,

I am NOT on the stock ROM, but I have a problem that is maybe connected or related to the network problems described in this thread.

Right now, I cannot post my issue in the ROM-related development forum, because of this 10 posts rule. But my issue soooo annoying that I try to find my luck here, too.

I am using the PacMan ROM (build 0603) for the Xperia Z and my problem is as follows:

I live in Switzerland and very, very close to the German border. This means, my phone “jumps” a lot into the Networks of German Operators, but I cannot switch back to my local operator and therefore I also loose my data connection.

The “Network operators” –search under “Settings → Wireless & Networks → More… → Mobile networks → Network operators” can successfully be performed and completed, but every time when I try to select one of the listed operators I get the following error message:

“Can’t connect to this network right now. Try again later.”

That’s sooooo annoying. I really would like to disable this automatic network operator selection.

Some search attempts already pointed to problem with baseband (maybe), but I do not know how to check or verify this.

Any help is very welcome.

Thanks a lot in advance.

Cheers

Andre
[Xperia Z Q&A, Help & Troubleshooting] akiramar:
I've tried this, but it does not help...

Rooted Xperia Z, .253 stock, T-Mobile Croatia

I did not have this problem with the .350 version.

It is now driving me crazy. It loses the connection at lease 10 times a day.
[Xperia Z Q&A, Help & Troubleshooting] anton.reyes:
I'm on stock .253, and the problem of loosing network signal manifested differently. Now the signal notification displays that it is connected to the network, but I cannot receive or send text/calls. The signal even changes when I change to different locations.

Only resetting the phone fixes the issue.

This is now more difficult because you wouldn't know if you are disconnected because the phone displays that you have signal! Sony please fix!
[Xperia Z Q&A, Help & Troubleshooting] kaorucat:
I think I solved it...

I tried different things like restarting the phone, going into airplane mode, restarting the phone after picking airplane mode, doing a hard reset...

The last thing that I tried, and it worked, was to have it turned on, then I removed the sim tray. The phone automatically restarts. Once it's done restarting, I plugged the sim tray back inside, the phone restarts again.

After that, I started out with 4 gray signal bars (instead of the black ones with the red x mark) and then it gradually restored itself to 4 bars. I've regained my signal completely, without changing locations.

It worked for me, might work for you too. :)

Edit: stock ROM, .253 C6603. For your information, though it may be irrelevant.
[Xperia Z Q&A, Help & Troubleshooting] gerickjohn:
I have a similar problem, but mine just drops for a bit then reconnects after a few seconds or a minute, but the problem is increasing in frequency I think. It just did it now while I'm typing. Still have to verify with my provider.

Edit: C6603 on . 434

Smart Communications Philippines Xperia Z
[Xperia Z Q&A, Help & Troubleshooting] silencer51:
Same here, rooted .253, this started happening in the last week or so I think, the phone loses signal yet displays signal bars normally. However it cannot make or receive calls until restarted. Its completely random, very frustrating.
[Xperia Z Q&A, Help & Troubleshooting] szuwx:
So many people claiming same problem, and none of u sent phone to sony? Im facing same problem but it occures once a day, sometimes once 3 days. I'm sending phone on warranty, i only need to get second phone for this 2 weeks.
[Xperia Z Q&A, Help & Troubleshooting] gerickjohn:
Not meaning to revive a dying thread but anyone here got their issue fixed? Did Sony fix the issue for you, mate? :confused:
[Xperia Z Q&A, Help & Troubleshooting] jaggeraugustine:
Where is this build.prop?

---------- Post added at 03:01 PM ---------- Previous post was at 02:51 PM ----------

Same goes here in the Philippines, I haven't reset my phone yet but I just restart my phone. This is really annoying after a couple of days of my update. Any news for a fix?
[Xperia Z Q&A, Help & Troubleshooting] QualQuek:
Try to reset all your APN and see what happens.
[Xperia Z Q&A, Help & Troubleshooting] lovestruck:
I updated my Xperia Z to .434 and now I cannot call or text. I am also a Globe postpaid subscriber in the Philippines. I tried the following fixes but it still did not work:

- reboot

- reset (using PC companion and factory reset from phone)

- switched on/off Stamina

- switched on/off Airplane mode

- remove and re-insert simcard

After resetting my phone, I cannot even connect to WiFi unless I retrieved my backup data, which is really weird.

---

Guys, my phone finally worked, a big thanks to my cousin in law's theory! Please check if your micro sim is LTE capable because this is a requirement when your phone's version is 4.2.2. I went to Globe business center to get a new micro sim with LTE; at first I was denied because my Globe number was part of the CEBU group (If your number starts with a 3, 6, or 7, they might deny your request because they said something is wrong with their system in activating the number. The error has been on-going for 3 weeks, no news on when it gets fixed). MANILA group system for activation is okay (starts with an 8, I don't know the rest, sorry). After convincing them that the problem lies within the sim, the Globe agent gave in; I fell in line and I got my sim. After waiting for 5 hours, there was no signal whatsoever on my phone so I called Globe hotline and I explained that there's still no signal with my phone even if I have the new micro sim with LTE; I even mentioned that there's a problem with Xperia Z users with Globe. After that call, I switched off my phone for approximately 2 hours, and when I switched it on, there's a signal and I can now call and text!

Please take note that if you are planning to bring your Xperia Z to certified Sony repair centers, they would actually reject in fixing or investigating your phone problems related to Globe's no signal because they know that there's a problem with some system from Globe. They will only accept the phones for repair if the Globe system is running smoothly again (which we don't know when it would get fixed).

Also, for added information, I backed up my phone data in PC Companion, and I had my phone undergo repair and factory reset from PC Companion and Update Service process before realizing the problem is actually with the sim card itself. Good luck!
[Xperia Z Q&A, Help & Troubleshooting] nurps:
ro.telephony.default_network=9 removal did not change anything. Don't i need to reset my phone for this to take effect?

And a LTE capable card is no option, my provider does not support LTE, what else can i do?

If i switch to 3g only my reception is back where it was before 4.2.
[Xperia Z Q&A, Help & Troubleshooting] lovestruck:
I didn't make the usual tweaks on my phone (root and unlock bootloader) so I cannot help you with your phone configurations, sorry about that. If you want, you can try to reset your phone to check whether your setting works, but make sure to backup your phone data.

If you switched to 3G, does this mean that you can still call and text? Because in my case, I cannot use my phone for call and text.

If your phone provider does not provide a LTE sim card, then I guess the best way to resolve this issue is to downgrade to Xperia Z's default OS version 4.1.

In any case, I do hope you can find a solution for your problem. Good luck!
[Xperia Z Q&A, Help & Troubleshooting] nurps:
Yes everything works in 3G.

For the backup reset thing i'm a little too lazy, even though my phone runs twice as long on battery without the "low signal" bug. :(
[Xperia Z Q&A, Help & Troubleshooting] Crys1s:
I also got this bug in every AOKP, CM or AOSP based roms. It returned to normal after reinstalling .244 stock-rom.
[Xperia Z Q&A, Help & Troubleshooting] alaric.fernandes:
Z1

I have the same issue with network connectivity being unstable.

Sony told me that there is a hardware issue. The part or phone will be replaced if under warranty.
[Xperia Z Q&A, Help & Troubleshooting] RaZieLRaH:
My problems is related to this topic so i own a C6603 but can't seam to get LTE connection i get H+ but never LTE even tho I'm in a area that gets LTE. Did get a new micro sim with the phone so i think the sim is good. Any ideas? Is it possible for the LTE chip to be broken? Must say i have no signal drops and that on 3G and 3.5G phone works great i just wish i could see 4G
[Xperia Z Q&A, Help & Troubleshooting] alaric.fernandes:
When you speak to Sony or your Telecom provider, whoever gave you the phone just tell them that you have noticed that the network connectivity isn't as it used to be. In some places it doesn't even show any network on the phone.

To prove it to yourself, use your sim in any other phone and compare performance. Even better if the other phone is a Z1.
[Xperia Z Q&A, Help & Troubleshooting] pboggini:
I just found this thread since my son told me his Xperia is having a problem staying connected. We have a somewhat low signal in our house but my MotoX and Nexus4 seem to stay connected just fine. iPhone5 will sometimes get "no service" but the Xperia has an X more often than not. Reading this whole thread, I'm left wondering what worked and what didn't for people. Did people get the phones swapped? Did that help? Did the changes to stamina mode help? My son has a pay as you go talk and text sim so I figured it might just be a problem with voice only. So, I put my nano sim and adapter in the phone and enabled data. No change really, it had trouble staying connected in my house. This is the same nano and adaptor that my Nexus 4 uses with much success. I'm on T-Mobile US and I'm talking to T-Force but I'm wondering if there are things I should try. His phone is stock, unrooted.

I'm lobbying to get a replacement but I'd like to hear from someone who's gone down that path to see if it helped. I don't have the phone with me so I'm not sure what version he's on but I know he's on the latest as he said he updated fairly recently.

peterb
[Xperia Z Q&A, Help & Troubleshooting] alaric.fernandes:
Xperia z1

Hi,

Your phone may be replaced, but I don't think it is the phone. I think it the service provider.

So sim swap or phone swap will not change the quality of service.

You will need to move to a service that works in your house.

A.
[Xperia Z Q&A, Help & Troubleshooting] pboggini:
Except that my MotoX and Nexus4 work fine even with the low signal. Are you suggesting that the Xperia is just a poor phone to use in low signal areas? The iPhone5 is even better though it does seem to have more issues than either the Nexus 4 or the MotoX.

peterb
[Xperia Z Q&A, Help & Troubleshooting] alaric.fernandes:
I am not saying that the phone is not good enough. There are 2 possibilities.

1. Its a hardware issue because the phone may have been dropped and the 4G/LTE hardware is damaged.

2. The phone isn't getting a strong enough signal.

If the phone works fine indoors in multiple places, its not the phone.

You also need to take into consideration that Sony works on keeping SAR low so it doesn't do an awesome job when it comes to low/less network coverage. A small price you pay to get lesser radiation.

A
[Xperia Z Q&A, Help & Troubleshooting] tanny0543:
signal loss after call

My xperia z looses signals when call is finished. signals come back on after 2 or 3 seconds but its weird. other than that i have no issues with network signals or wifi signals. running 4.3.......569 c6603
[Xperia Z Q&A, Help & Troubleshooting] pboggini:
What is your normal signal strength? Do you have other phones that you can compare to? We have a somewhat low signal in our house and I think it's just that the Xperia does not deal well with low signal situations like the Moto X and Nexus 4 do. I could see it doing this if you are on LTE, take a call (switches to HSPA+), you hang up and it's switching back.
[Xperia Z Q&A, Help & Troubleshooting] alaric.fernandes:
Try a hardware reset.

Press and hold the power button and the volume up keys together.

The phone should restart or may even just shut down.

switch it back on.

try making a call or 2.

If that doesn't work, back your phone up with sony's backup software and then try a software reset.

try calling after the reset and see if the phone looses network.

If it loses network, send it for repairs (under warranty)

If it doesn't lose network, its 1 of your apps.

Let me know if that works.
[Xperia Z Q&A, Help & Troubleshooting] tanny0543:
Normal signal strength is normal like other I had on other phones. One more thing that this is an Australian phone that im using in Canada on Fido and I flashed rogers Xperia zl basebands to get the LTE working for Canadian carriers.

---------- Post added at 12:39 AM ---------- Previous post was at 12:37 AM ----------

Thanks for your reply. Ill Def try that and will let you know if it solves the issue. Do you think a different baseband might be causing it? Cuz this is an Australian phone that didnt support LTE in Canada. So in order to get the LTE wprking I flashed rogers Xperia zl basebands. I got the LTE working with no issues.
[Xperia Z Q&A, Help & Troubleshooting] pboggini:
Sorry, my question wasn't clear. It sounds like you likely have a pretty strong signal (2-3 or more bars) but it drops out for a few seconds. I just wanted to make sure that what you were seeing, while similar, was different that what I think I'm seeing here. I'll have to ask my son if he's noticed any problems in high signal areas or not.
[Xperia Z Q&A, Help & Troubleshooting] tanny0543:
I have very strong signals no issues at all. its just that the phone takes it sweet time to switch back to lte from 3g after a call is disconnected.
[Xperia Z Q&A, Help & Troubleshooting] alaric.fernandes:
Yea.. That shouldn't be happening.

try the reset directions above.

Sounds like those are your only options.
[Xperia Z Q&A, Help & Troubleshooting] Orionwaves:
The same thing happened to my Xperia Z (C66303), I wanted to root it to have custom UI etc, so I had to degrade my android from 4.3 -> 4.2.2, after rooting I noticed that my mobile data isn't working anymore so I found a root for 4.3, didn't even have time to root before noticing that mobile data isn't working. I have no idea what might be causing this but however I got speedtest working and my ping was 10k ?! 0.02 down and 1 upload..
[Xperia Z Q&A, Help & Troubleshooting] alaric.fernandes:
Reset=Orionwaves;51342568]The same thing happened to my Xperia Z (C66303), I wanted to root it to have custom UI etc, so I had to degrade my android from 4.3 -> 4.2.2, after rooting I noticed that my mobile data isn't working anymore so I found a root for 4.3, didn't even have time to root before noticing that mobile data isn't working. I have no idea what might be causing this but however I got speedtest working and my ping was 10k ?! 0.02 down and 1 upload..[/QUOTE]

Try a software reset. And after the software reset, get a hardware Reset(press and hold the volume up and power button together). You will not lose any data with the hardware reset.

You can try the hardware reset before the software reset if you want.
[Xperia Z Q&A, Help & Troubleshooting] arth-wader:
sony call drop sim card problem

Hi All;

I started having the same problem for more than 4 weeks. I have tried all of your replies but none really worked.

so letme simply summarize how i survied.

- have removed all the xperia build in addons facebook, twitter, etc. and disabled them

- removed whats news app which is coming with a system update and disabled

- removed movie creator app which is coming with a system update and disabled

- removed linkedin app

I am not totally sure which really solves the issue but my phone is perfect right now. no call drops no sim card ejects no app crashes. there has to be a bug in one of these apps I am guessing the movie creator or the whats new is the main cause of it...

hope will help you all
[Xperia Z Q&A, Help & Troubleshooting] Didier Ganesh:
Im facing the issue for couple of months.

Is the issue resolved by Sony ?

Is there any solution ?
[Xperia Z Q&A, Help & Troubleshooting] maids:
I am having the same problem. My signal drops often and I dont realize as the phone is on my desk.

I have done hard reset so many times now.

I thought it might be that my house has a tin roof but even when I go out and I watch my phone the signal is up and down all the time
[Xperia Z Q&A, Help & Troubleshooting] Lator47:
Same...

I have the same problem, I´ve tryied a lot of things, but the only solution is to use "ONLY GSM" only with this i have no signal lose, but when I use WCDMA it inmediately drops, BUT others phones work perfectly in WCDMA in the same place so it`snt problem of service signal... I´m almost losing the hope for a solution..... I started having the problem in .283.... updated to .292 and it´s the same....
[Xperia Z Q&A, Help & Troubleshooting] CyrilThomas92:
You found any solution to the problem? I also face the same problem..
[Xperia Z Q&A, Help & Troubleshooting] HyperEscape:
Any body got a solution to this. I have the Xperia Z C6603, have tried it with 4.3 and 4.4 stock ROMS but the signals indoor in the home are zero.

The network mode is WDCDMA/GSM auto , when taken outdoors it sporadically gets some signals. Is there any software /hardware remedy to it.

Thanks.
[Xperia Z Q&A, Help & Troubleshooting] drmudo:
help xperiaa Z3

Any body got a solution to this. I have the Xperia Z C6603, have tried it with 4.3 and 4.4 stock ROMS but the signals indoor in the home are zero.

The network mode is WDCDMA/GSM auto , when taken outdoors it sporadically gets some signals. Is there any software /hardware remedy to it.
[Xperia Z Q&A, Help & Troubleshooting] Battle dogs:
Ys i m also facing same problem with my xeperia z3.

Now what to do pls tell me any one.
[Xperia Z Q&A, Help & Troubleshooting] nosy_wiz:
IS there a solution for this?

I recently used this phone due to my other phone dying. I am facing signal problems with this.

I have a rooted phone with resurrection remix ROM installed.

Has a solution been found for this problem? any info would be helpful.
[Sony Ericsson XPERIA X10 Mini] supaflycowboy:
Hi folks,

im a newbie and could any1 help please?

ive a sony xperia x10 mini pro,u20i

and am looking at the posibility to root i and get the best from my phone,

what the best thing to do?

and is there a easy way to root?

meny thanks

supaflycowboy
[Sony Ericsson XPERIA X10 Mini] SmG67:
Download flashtool (second post in the x10 mini pro development section)

Install it

Install the drivers in the drivers subfolder if you don't have Sony Update Service or PC Companion

Delete x10blrelock.ftf from the firmsares subfolder. (it will brick your phone if you accidentally flash it to your phone)

Run flashtool

Press the padlock button and follow instructions.

Your phone will be rooted.

As for best ROM, opinions differ, so you have to try some out for yourself.
[HTC Sensation XL] b2liberty:
i almost tried all the unofficial roms but they all have the same error the wifi isn't working in all of them i retried the wifi with a stock rom and the wifi was working just fine my mobile is htc sensaition xl i did wipe out every thing and did s-off the device before flashing all the roms but the wifi still didn't work does anyone have some informations that may shred some light on the problem .

.

.
[HTC Sensation XL] fshami:
Same issue with Sense 3.6 ROMs?
[HTC Sensation XL] b2liberty:
here is the lists of the unofficial roms that i tried

1 miui v 2.12

2 xl 4.0 v 6.0

3 SS_KingCobra Build 6 By S.a.M.e.R_d

4 Total_Senseless_SXL-v4.1.1

5 RunElite_Sense4.1_V1.5_Beta

6 Cynsation_Cm9_V1.2.5 ota but i was stuck on the logo so ididnot get the chance to try the wifi

:confused: