At a loss over signal loss. - Sony Xperia ZL

I have an annoying signal loss problem that has been on-going since 4.4, seemed to get a bit better with 5.0, but is bad again with 5.1. At random intervals the phone just loses all signal, as in no bars at all (just an empty triangle), and not even a provider showing. It does say "Emergency Calls Only" in the titlebar, not "No Service", suggesting it actually has signal. This is exactly what it does with no SIM inserted, but I have tried different SIMs to no avail. Eventually it does come back again by itself, but restarting the phone always fixes it straight away.
I can also trigger this behaviour by making a call. Sometimes it works, but sometimes as soon as the call connects, the signal does as described above (so naturally the call drops).
I have googled this for hours and found some problems that sounded similar, but no suggested fixes made a lasting fix on mine. One suggested fix was to clear cache and data for the "Phone" app, force stop, then restart. However, I noticed I have 3 apps labelled Phone. Is this normal? I did the clear/stop/restart on all of them, and that possibly helped for a while, but it started doing it again.
Has anyone seen or heard of anything like this?

the network problem is very troublesome. I now use two phones, one specifically for calls, and one this X ZL. Mine has a bit different problem. it doesn't catch good signals, and while on calls, it automatically loses signals. the call quality is also poor, i tried different sims, but to no avail. my 4 year old Samsung champ gives loud clearer calls on the same sim on the exact same location at the same time where my ZL fails to deliver. i wish we could change the hardware network module

gigapus said:
I have an annoying signal loss problem that has been on-going since 4.4, seemed to get a bit better with 5.0, but is bad again with 5.1. At random intervals the phone just loses all signal, as in no bars at all (just an empty triangle), and not even a provider showing. It does say "Emergency Calls Only" in the titlebar, not "No Service", suggesting it actually has signal. This is exactly what it does with no SIM inserted, but I have tried different SIMs to no avail. Eventually it does come back again by itself, but restarting the phone always fixes it straight away.
I can also trigger this behaviour by making a call. Sometimes it works, but sometimes as soon as the call connects, the signal does as described above (so naturally the call drops).
I have googled this for hours and found some problems that sounded similar, but no suggested fixes made a lasting fix on mine. One suggested fix was to clear cache and data for the "Phone" app, force stop, then restart. However, I noticed I have 3 apps labelled Phone. Is this normal? I did the clear/stop/restart on all of them, and that possibly helped for a while, but it started doing it again.
Has anyone seen or heard of anything like this?
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check if antenas are correctly connected. https://www.youtube.com/watch?v=7yADs4OsAXg

Related

Not receiving texts and/or phone calls

Has anyone else have these problems?
1. Random timeouts, won't receive text messages / phone calls randomly.
Ever since I started using my captivate glide it seems that I randomly won't receive text messages or phone calls. It happened before and after the software update. I notice I won't receive a text for a while, will restart my phone and all of a sudden I receive like 3 of them. Or eventually, after a few hours all the texts that I received will come all at once. I have been told that during these periods my phone sends calls straight to voicemail.
I know it isn't AT&T because my Xperia X10 I had previously never had this problem and I'm living in the same location. I have full bars nearly all the time, so it isn't that I'm not getting service.
2. Email continuous refreshing and not polling correctly.
When using the email app and connected to HSDPA+ I will not get emails randomly and when I go to refresh manually, it says "Refreshing..." at the bottom for minutes at a time.
This doesn't happen when I'm on WiFi and I noticed I can fix it by using the browser to load a web page, then the email app will download new messages.
AT&T
Baseband I927UCKL1
Build Number GINGERBREAD.UCKL1
bessdt0 said:
Has anyone else have these problems?
1. Random timeouts, won't receive text messages / phone calls randomly.
Click to expand...
Click to collapse
had the same problem, pulled the back cover, powered off, removed and re-inserted SIM card, added a piece of strong clear tape to keep it snug, haven't had the problem again.
HTH
Thanks, I'll give that a shot. I just replaced the SIM card 2 days ago since AT&T told me it sounded like a SIM issue. However, the problem persisted.
AT&T told me they couldn't replace my device because it was an "intermittent" issue. Pretty ridiculous, but hopefully your trick will work.
bessdt0 said:
Thanks, I'll give that a shot. I just replaced the SIM card 2 days ago since AT&T told me it sounded like a SIM issue. However, the problem persisted.
AT&T told me they couldn't replace my device because it was an "intermittent" issue. Pretty ridiculous, but hopefully your trick will work.
Click to expand...
Click to collapse
Maybe you or someone else will be able to confirm my issue? Anyone else think the SIM slot is off by a millimeter length/width/height-wise? My sim card seemed very loose, and looking now, with the tape holding it down, looks like there's a slight gap between the card itself and the little metal cage...
Lookin4Trouble said:
Maybe you or someone else will be able to confirm my issue? Anyone else think the SIM slot is off by a millimeter length/width/height-wise? My sim card seemed very loose, and looking now, with the tape holding it down, looks like there's a slight gap between the card itself and the little metal cage...
Click to expand...
Click to collapse
Mine fits in just right but I haven't checked it for a while. I'll check it once I get a chance.
My SIM card seems to be less secure than my last phone but not that loose. I tried the tape trick, didn't work for me.
I did discover one thing though, at least for me, it tends to coincide with my WiFi radio being turned on. I tested it twice and it happened.
My WiFi radio off, it worked all day, then when I turned my WiFi radio on and ~30 minutes later I wasn't able to receive texts or phone calls.
I'm going to keep testing to see if I can reproduce the problem so AT&T will have to either replace it or fix it.
When looking in About Phone > Status I see that when I have my WiFi turned on, my mobile network state is disconnected. Not sure if this is normal or not.
bessdt0 said:
When looking in About Phone > Status I see that when I have my WiFi turned on, my mobile network state is disconnected. Not sure if this is normal or not.
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Click to collapse
That is normal, the OS automatically controls the Mobile network once WIFI is connected. It definitely sounds like a hardware issue to me. Hopefully you can convince AT&T if that is the case.

Signal/Data Issue

Hey guys ready for a weird one? So the other day I turned on WiFi on my SIII to use the university's WiFi instead of my data like i usually do, and when it was time to turn off WiFi, I lost complete signal for data and cell reception. It was weird, so did the usual trouble shooting stuff (checking if data is on, roaming off, wifi off, correct APN)and everything there was fine. So i turned off data and turned it back on, still nothing, i turned on airplane mode, then turned it off, then it would fix the problem....for a little. After a little while the same problem would occure. So I decide to reboot the phone. That too temporarly fixes the problem. So when I got home, I did a factory reset. again, temporary fix. So then I decide to install a new rom, so I install the latest build of CM10. Fixes problem, then problem occurs again. Its extremely annoying, everything was working perfectly fine until the other day. I was on official ICS Stock Rom btw when the problem occured. My phone has been rooted this whole time, but that never was a problem the 3 months I've owned the phone. The problem is now occuring in CM10 as well. Anyone have any ideas as to what to do? Oh side note, when I installed CM10, I wiped everything chache data everything to make it as clean as possible. The issues are random disconnect from 4G data or rather any data reception, no SMS/MMS income or able to send,no calls. WiFi would work. Could this be a hardware problem? I've never dropped my phone or anything. This literally just randomly happened.
Yup
I am having this problem as well. Seems I loose reception. If I call my voicemail, reception returns for a bit and then turns off again and I repeat the process...my IMEI is fine, my APN seems fine, I don't understand what the problem is. I have tried multiple roms and continue to have this issue?
jason.T said:
I am having this problem as well. Seems I loose reception. If I call my voicemail, reception returns for a bit and then turns off again and I repeat the process...my IMEI is fine, my APN seems fine, I don't understand what the problem is. I have tried multiple roms and continue to have this issue?
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Click to collapse
I have the same exact problem!
Similar things happened to me out of the blue about 3 weeks back. Dropping data, no connection to network, calls take 4 or 5 tries to go through sometimes, sms is flakey. I went back to stock 4.1.1 and still happened.
Went to phone store (Telus) and got a new sim. Didn't really help. Now phone is in the shop under warranty and I have a loaner HTC One S :-\
When I was around a strong cell signal it seemed better. My thoughts are that one of the power amplifiers is not working properly or at all. I will probably never really know.

Nexus losing cell signal then cant make calls

Its now happened 4 times always in the same place and Im wondering if its an issue with the Nexus or my carrier (or a combination of both) it never happened with my old Sony Xperia SP (call still dropped on xperia but always could dial or be called).
I go through a small village and the signal drops so call ends. Phone shows signal so I try and call back and call instantly says 'call ended'. The other person cant contact me either.
3 times its worked by turning off the phone then restarting it, today I had to restart then toggle aeroplane mode a few times before I could call, all the while the phone showed signal.
Is there anyone else who has experienced this behaviour? Its only this one location ive had the issue but not being able to reestablish a call is a real pain and shouldnt be happening from what I can see.
Network is EE in the UK.
May be a little late to answer, but i have the same problem. Could you do something to solve this issue?

no sound on voice calls - mystery problem

Hey! My wife has a t-mobile G3, stock non-rooted. It's running 6.0. She's had it for a year, and it's been fine (other than some wifi issues here and there). But in the last few weeks, she can no longer make calls.
The weird thing is the calls do "connect", but there's no sound either direction. For example, if she calls me, my phone will ring, but when I answer there is no sound either direction. Both of our phones show the call timer counting the seconds, as if they are both connected. If one of us hangs up, the other phone gets disconnected immediately---so the 2 phones are DO connect with each other, but no sound can pass. This happens with every number she calls.
I would have thought it might be a network problem, but she did a factory reset and it worked fine---until a few days later when it broke again. So I'm thinking it's software. Sometimes her phone will work for a few hours, but then it will stop working for a few days.
I've tried turning ON/OFF bluetooth, wifi, data, & wifi calling. I've tried changing to 2G network. I've tried different sound/noise settings. No change.
Any ideas?? Thanks

anybody having issues with wifi and mobile data (T-Mobile)

I'm getting tired of it, wifi disconnects and reconnects or flat out doesn't work, mobile data flat out doesn't work most times unless I reboot the phone for either of them to work. I'm rebooting about 4-5 times a day just to get either working. I'm at my wit's end and about to get rid of this thing as soon as I can.
I generally love this phone, but I'm seeing similar issues. WiFi says connected, but I don't get any data. I thought it was my network at first, but noticed other devices working. Tested network while my phone was acting like this, and my WiFi and network were working great.
Separately, my phone sometimes won't dial out. I use Google Voice, so I'm not sure if it's the phone or Google that's not working, but it's very frustrating. The dial screen comes up, then immediately disappears. No errors or anything to indicate that it ran into problems. The dial screen just flashes. Rebooting seems to fix that. But all very frustrating. Especially when I'm trying to call someone while driving. I don't want to have to look at the screen. I want to be able to tell the phone to call and know it's going to do it. Instead, I tell it to call, it confirms it will call, then nothing.
chris.arney said:
I generally love this phone, but I'm seeing similar issues. WiFi says connected, but I don't get any data. I thought it was my network at first, but noticed other devices working. Tested network while my phone was acting like this, and my WiFi and network were working great.
Separately, my phone sometimes won't dial out. I use Google Voice, so I'm not sure if it's the phone or Google that's not working, but it's very frustrating. The dial screen comes up, then immediately disappears. No errors or anything to indicate that it ran into problems. The dial screen just flashes. Rebooting seems to fix that. But all very frustrating. Especially when I'm trying to call someone while driving. I don't want to have to look at the screen. I want to be able to tell the phone to call and know it's going to do it. Instead, I tell it to call, it confirms it will call, then nothing.
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I'm getting the same problems and it's annoying the hell out of me I'm paying this phone off but I'm about to just ditch it buy a pocofone and just pay im this off separately or try to trade it in for a one plus 6T

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