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Phone shows full service but I don't receive calls

Sometimes people call me and get a message saying my phone is off or out of service. But when I look at it, it often shows 4 bars of service..
When I call someone, the problem disappears temporarily, and I start receiving calls again (and I receive all the SMS's I was supposed to get at once), only to appear again later for no reason (a soft reset also solves it). It's not related to location, it also happens when I spend the day at home (where I get a strong signal).
I don't think it's a operator problem either, since my operator is known for it's good services, and other people who use "normal" phones never had such a problem.
I tried 3 different ROMs (dutty's hybrid, Hyperdragon and AthineOS) and 3 different radios (dutty's radio (1.65 something), hyperdragon's (1.70 something), and eMo radio). Right now I'm using AthineOS with hyperdragon III's radio, and almost no programs installed..
This problem happens both in 3G and EDGE mode.
Anything I can do about it?

Send it in for repair?
Seems you tried all you could...

Don't think I can send it for repair, since it's an AT&T Tilt and I'm not even in the US..
Guess I'm outta luck then
Anyone else have any ideas?

have you tried the sim in another handset, sounds like a network problem to me.

3G Network
Are you using 3G Network?
Sometime I use 3G band and even It show good signal I loose phone calls.
I changed to GSM and no phone calls loose.
This happens in São Paulo/Brazil but...
EDIT: Sorry. Now I saw that you reported this problem also using GSM band.
Thanks.

I am not sure if you're using your US SIM card in a foreign country?
Maybe you just forgot to enable INTERNATIONAL ROAMING before you left ... ?

I'm having the same problem
I seem to have started with the same problem about a week ago. A couple people complained that they called me but it rang twice and went to voicemail - My phone never rang. However, after I made a call (or apparently did something to "wakeup" the phone), I would get the voicemail notification (2 hours later).
I tried reseating the SIM card, but then it went to "SIM Card Missing". I did a hard reset, but that didn't help. I took it back to AT&T and they replaced the SIM Card. That seemed to work again, and certainly would have been a convenient fix (bad SIM card - too easy). So I've just spent all weekend reloading all the apps, but now it's happening again!!
The symptoms are; After I reboot the device, I can receive one or two calls, then it doesn't ring anymore (the caller hears 2 rings then it goes to voicemail). If I cycle the Phone radio button in the Comm Manager, or cycle power, it comes back to life for 1 call, then craps out again.
I'm just using the standard AT&T ROM (without the Bloatware after this past reset) and the standard/default radio version 1.27.12.11
The only thing that I have noticed that seems different lately is that the "Comm Manager" task is always running when I look at the running programs (which I don't think it used to) I had also recently installed Garmin XT.
The device is of course 1 yr + 2 weeks (so I assume just out of warranty)
Any help would be greatly appreciated!!!

Hmmm,
what I would try, is, to just make a hard reset, load only my contacts to the phone and run it for a while to monitor its "Incalling" behavior. If everything seems to be fine, I would go ahead and start installing an application, then monitor my device again for a while, if everything is fine I will go ahead install the next application ... and so on. That is just to make sure that no 3rd party application causes this problems.
BTW:
I don't think that GARMIN causes this problem. I used to run Garmin on my HTC too (v5.0) until I came accross SYGIC McGuider (which works much better and card scrolling is much smoother than Garmin).
Well,
to come back to the point: if you get the same problems without loading any 3rd party application on your device, then I would recommend trying another ROM (best advice: go with the HTC stock ROM). If it also happens with the other ROM then it might be hardware related and difficult to fix.

Thanks - I knew that's what I should do, I just didn't want to do it after having spent all weekend reloading and configuring it. I thought I had read somewhere about Garmin having to have the phone radio on to work, so I was hoping there was a setting somewhere that I was missing that was powering the radio down. But..... I suppose it's time to go back to common sense and just do the reset
So far it seems to be working now. I'll give it a few days with just the basics and then start reloading one at a time.
Thanks for the quick response!

Spoke too soon
looks like I spoke too soon, it's doing it again - seems like it was fine for about 3 hours, but now .....
guess it's time to try my luck with AT&T - time to see how good their customer service is

bbaydiver said:
looks like I spoke too soon, it's doing it again - seems like it was fine for about 3 hours, but now .....
guess it's time to try my luck with AT&T - time to see how good their customer service is
Click to expand...
Click to collapse
Well, I'm experiencig totally same stuff here. I don't know whats really going on. I've NEVER before had such or even simialr problem.
Ive installed stock HTC ROM. And its going again.
One question. Are you using Opera Mini maybe?

kristoff_sz said:
Well, I'm experiencig totally same stuff here. I don't know whats really going on. I've NEVER before had such or even simialr problem.
Ive installed stock HTC ROM. And its going again.
One question. Are you using Opera Mini maybe?
Click to expand...
Click to collapse
no, I was just using the default browser.
I've got nothing installed on it at this point so I'm guessing it's hardware related.
Over the last couple months I had been experiencing some strange battery drainage (not related to the GPS issues). I don't know if that was a symptom or not. It just seems like the radio is going to sleep somehow - it wakes up for a little while if I sync my email, cycle the radio via comm manager, or cycle the power.
Anyone know if there is a setting somewhere that controls that? (sure would be nice if it were that simple)
The AT&T store was basically useless, all they did was give me the phone number for the warranty department (but since I'm 2 weeks past warranty, he doesn't think they'll help me), and of course offer to upgrade me to the Fuze for $375 - no thanks!

I've had the same issue (I think). I too think that it seems to happen when I have a 3G data connection active and moving back to GPRS (non 3G) seems to make it better....
I'm on a standard UK ROM and using BTMobile as a provider.
I was driving down the motorway the other day and overtook a friend. He rang me and went straight to voicemail. I then got a text to say that I had a voicemail and rang him back.
I was running TomTom Traffic at the time so would have had a data session enabled....
I think its something to do with the data session sometimes not letting a call through but can't put my finger on anything and certainly can't find an option to change any settings...
Also, even at home, I'm constantly picking up my phone to see that it "has no signal" and the exclamation mark is displayed - so calls aren't coming through - but it then connects and shows a three-bar strength signal. Don't understand why it keeps dropping out, but I get a 3G connection at the front of my house and an ordinary G connection at the back and I think that it sometimes to stay connected to the 3G connection for data even when the phone signal is very poor and it would be better dropping that and connecting at "old" GPRS speed...
Same on the train on the west coast main line out of London. I think having the 3G turned on causes the phone signal to drop out completely more than when 3G is turned off, as the phone tries to hang on to the signal of a 3G cell and doesn't successfully switch over to the next "non 3G" cell whilst in a call.

have you tried a new radio such as NIKI's?

well, AT&T warranty was even less than useless. Home phone, Internet, and Wireless all through AT&T and the best they can do is "see if they could get me a deal on a new phone" or refer me to HTC technical support. Nice customer service AT&T!!!
HTC technical support was actually trying to be helpful, once she found out I already did a hard reset, she referred me to their warranty group. They looked up the S/N and it's still under their warranty (I guess theirs is 15 months after manufacture date). Now the only problem is I have to send it in to them to see if it's covered under warranty, and of course be willing to go without my phone for 2 weeks (and pay them a yet to be determined amount if they decide it's not under warranty).
I'd like to try a different radio, but looks like there's too much for me to read up on - I need to get the device fixed, I've already lost too much time with it being messed up and me screwing with it.

Update
so this morning I was ready to throw in the towel and send the device back to HTC. At least they were willing to help me out, unlike AT&T.
I get to work, and of course the phone seems to be working (which isn't unusual, it works for a little while then craps out). Come lunch time, it's still working (now this is unusual, it must be a fluke, I'll give a couple more hours before I package it up). 4:00 and it's still working! Now I'm starting to wonder if it's got to do with the cell towers near my house (and the AT&T store since it did it for them too).
I email my buddy who lives about 1/2 mile away and also has a Tilt just to see if he's had any similar problems. He calls me back laughing. There's 5 People in his office with the exact same problem (and not all Tilts either).
So to make a short story long....... it appears to be a problem with AT&T, NOT the device (but Thank You very much AT&T for the incredible customer care you demonstrated and for trying to screw me into buying new devices for outrageous prices)
So at this point, I'm not sure if it's that AT&T has fixed the issue across the board, or if it was the "Resync the routing" that the online chat person tried last night that finally propagated across the network (I assume so that AT&T can find my phone in order to route the calls to me).
I guess we'll see if it does the same thing when I get back closer to home tonight, but I'm relieved that it appears to be fixed.
Thanks everyone for the suggestions! Now I have a little more time to read about how I can screw up my phone on my own schedule - all the practice of resetting it and reinstalling everything, and seeing how much faster it is has inspired me

Hi bbaydiver
Did Att fix your problem? I had same issue with my tilt 8925. I tried all the orginal Att rom "same problem". After couple minute, I can't receive and make call. thanks

kwong1998 said:
Hi bbaydiver
Did Att fix your problem? I had same issue with my tilt 8925. I tried all the orginal Att rom "same problem". After couple minute, I can't receive and make call. thanks
Click to expand...
Click to collapse
Have you tied asking AT$T for a new sim card ? They do wear out you know.

denco7 said:
Have you tied asking AT$T for a new sim card ? They do wear out you know.
Click to expand...
Click to collapse
I didn't tried asking AT&T for a new sim card. but I will call them to change the sim card. Does anybody know how to disable the 3G function?

Just a "me too..."
Hello everyone. I just wanted to report that I'm having the same issues...they started about a week or so ago.
I've had my AT&T Tilt for about 8 months now (it's a warranty replacement for my first tilt, bought in July...so of course, I'm out of warranty). I recently had problems receiving calls, and then I started being unable to make calls, even though my phone shows a decent signal...anywhere from 4 bars to 2 bars. When dialing, it'll say "Dialing..." for a few seconds...and then it clicks off. A soft reset will fix things temporarily, but that's it.
I'm running the stock AT&T ROM (I'll check the version number if someone thinks it'll help), and I've tried doing a hard reset AND replacing the SIM card. Same effect.
Someone please let me know if they resolved this problem. AT&T offered me an HTC Fuze...but I'm extremely wary of other phones by this manufacturer. I'm very, VERY tired of phones crapping out on me after having just spend a couple of hundred bucks on them. At this point, I'm just looking for something reliable. If someone else here has had problems with the Fuze, please let me know...not to start any fights around here, but I'm actually thinking about going with the iPhone.
Thanks.

Loosing network signal

Hi!
After weeks of flawless function my Xperia can not find my carriers phone network.
I have updated the phone to the new ROM but that does not help.
The phone finds the SIM card and asks for the code.
Strangly it can connect to internet through my carrier (Tele2).
But I can not get a connection to the phone network and make a normal phone call.
Is something wrong with the phone?
NO, cause with another carrier (Telenor) everything works pefect.
Then obviously something is wrong with my carrier (Tele2) or the SIM-card.
NO, cause when I put my Tele2 SIM-card in another device (Ipaq 6515) it works perfect.
The Ipaq is not a 3G-phone. Can that have anything to do with it?
I'm getting lost here, all help is appreciated.
(ORIGINAL MESSAGE
Hi!
After weeks of flawless function my Xperia has started to lose it's phone network.
I notice it after I wake my phone up from stand by mode.
It doesn't help to turn the phone option off and on in Comm manager, but it has sometimes helped turning flight mode on and off.
Other times I had to restart the phone.
This happens a couple of times every day, after long times of not using the phone. I have not been able to trigger this problem, so I don't know what causes it or exactly when it happens.
Strangly it can connect to HDSPA while it has lost the phone network.
I have also experienced som freezes when I'm flipping between the panels to much.
All help is appreciated, thanks.

It would be helpful if you could give us more information.
What ROM are you using
Which carrier you have
etc.

mo.ammi said:
It would be helpful if you could give us more information.
What ROM are you using
Which carrier you have
etc.
Click to expand...
Click to collapse
I'm using:
ROM 1.02.936.3
Radioversion 1.06.25.29
The carrier is Swedish Tele2.
In Sweden we have GSM-900 and GSM-1800.
Tele2 also provide me with UMTS and HSDPA.

Today the problem became worse.
Even after repeated soft restarts it refused to find the phone network.
Then I change SIM-card to another carrier and it found the network.
I also tried the SIM-card that's giving me problems in another device. Works fine.
So both SIM-cards works. I'm now gonna go with the new carrier during the day to see if the problem come back.
If anyone have any ideas, please help.

krion said:
Today the problem became worse.
Even after repeated soft restarts it refused to find the phone network.
Then I change SIM-card to another carrier and it found the network.
I also tried the SIM-card that's giving me problems in another device. Works fine.
So both SIM-cards works. I'm now gonna go with the new carrier during the day to see if the problem come back.
If anyone have any ideas, please help.
Click to expand...
Click to collapse
All I can say that Xperia sometimes looks for the signal a bit longer it should IMO,
but I also know that carriers have many many problems usually and they're also often responsible for signal drops in some places too.
I know that 'cos I was talking to my carrier many times about it and learned something about it...

have u tried hard resetting the phone or re-installing the software? ..
if u run the sony update software it will give u the option to re-install your phones software - not sure if that has the same effect as a hard reset ..
probably worth trying

Amanox said:
have u tried hard resetting the phone or re-installing the software? ..
if u run the sony update software it will give u the option to re-install your phones software - not sure if that has the same effect as a hard reset ..
probably worth trying
Click to expand...
Click to collapse
Thanks for answering, I have now done a total reinstall and updated the phone to the newest R2... ROM.
The problem remains.
The phone finds the SIM card and asks for the code.
It can connect to internet through my carrier (Tele2).
But I can not get a connection to the phone network and make a normal phone call.
Is something wrong with the phone?
NO, cause with another carrier (Telenor) everything works pefect.
Then obviously something is wrong with my carrier (Tele2) or the SIM-card.
NO, cause when I put my Tele2 SIM-card in another device (Ipaq 6515) it works perfect.
I'm getting lost here, more ideas is appreciated. Tomorrow I will call Tele2 support.

Have you tried disabling 3G/HSDPA?
Chance that you have very poor 3G on your phone, whilst the IPAC is picking up ok 2G.

artesea said:
Have you tried disabling 3G/HSDPA?
Chance that you have very poor 3G on your phone, whilst the IPAC is picking up ok 2G.
Click to expand...
Click to collapse
Thanks for replying.
I disabled HSDPA/HSUPA in the advanced network menu. But it didn't help.
I also tried to choose GSM only in the phone seetings menue. But I could not even change the setting. Just got an error message about not being able to change the network (or something similar).
Is there any other setting that might be worth trying?

krion said:
Thanks for replying.
I disabled HSDPA/HSUPA in the advanced network menu. But it didn't help.
I also tried to choose GSM only in the phone seetings menue. But I could not even change the setting. Just got an error message about not being able to change the network (or something similar).
Is there any other setting that might be worth trying?
Click to expand...
Click to collapse
Having worked for several phone companies a few years at customer service I know what the procedure is.
-First thing they do is ask you to do a "crosstest", try your SIM in another phone and see if that works.
-You'll tell them that you did that and everything works fine when you use another phone.
-They'll automatically conclude that there's something wrong with your phone (correctly)
-They'll ask you if you could do a hard reset ( You did that too)
-Then maybe they'll try and reset the network (which almost never works)
Basically they'll have no other choice then for you to return it and have them look at the problem / replace your phone.
I don't think we here can help you with your problem
Good luck and keep us posted

Get a new SIM card. I've seen problems like this before, and an updated SIM card solved it.
The best way would be to test your SIM card in a similar phone, the ipaq not being close because it's not even 3G.

maedox said:
Get a new SIM card. I've seen problems like this before, and an updated SIM card solved it.
The best way would be to test your SIM card in a similar phone, the ipaq not being close because it's not even 3G.
Click to expand...
Click to collapse
I'm so confused right now.
Got my new sim card today, problem remains.
I call the carrier support and after they've looked the IMEI-number up they say that the phone is barred by an external operator. They won't tell me the reason and by what operator.
So I call the other carriers support and after they've done a IMEI-search they say that the phone is not locked in any way, by them or any other operator. After have been talking to Xperia support they come to the same conclusion. The phone is not locked but agree to that something is wrong, with phone or carriers, and they want me to try with a third carrier.

Final
I've handed in my phone to the seller and got another one back instead.
The end

Exact same problem
Howdy folks,
I have the exact same problem: My Xperia has worked fine for a month. Suddenly I can't register with Tele2 network (tried another Tele2 card as well that didn't work) for calling but have access to data channel so I can surf. Got told by the Tele2 support that my phone was fu**ed up. Got pissed off. Tried a sim for another provider (Telenor) that worked. Called the Tele2 support again. They noticed that I have an old (2g) sim, so they will send a new (3g) card to test if that fixes this mess. It should arrive late this week or early the next. Can't wait...
I'll keep you posted in this thread (or, if I should instead have made a new thread, a moderator may spank me and I will do better).
/Swedish Dave

Nope, new sim-card didn't fix it. But I have found at least one other xperia-user with this problem...

bad GSM signal
I have a X1
rom 1.03.931.10
radio 1.10.25.18
protocol version 52.56.25.29W
and since from the start I have bad GSM signal I have like 1-2 lines onli and it go up to 5line but onli from time to time (and then it drops again to 1-2line or none but If Itray to call is working or I get called but I can berly hear them bicose of the bad signal) on O2 network and in T-mobile is the same no mather wher I'm in town or outside of town; I'm in UK
is the phone damaged?? or...
sry for my bad english

My phone does the same thing
My x1 has had no problem with phone function or network. However, from the last week, the signal began to be lost sometimes, and the machine turned off automatically. and finally today, there is no signal at all.
MY SIM card works with other phones, so, I thought it might be software problem, and hard reseted with new rom. However, still no signal. It keeps looking. Does anyone have the same problem, and hopefully, solution?

I´m using my X1i with Tele2 as my service provider,but i don´t have any problems with signalstrength.. Works just fine..

speederTM said:
I have a X1
rom 1.03.931.10
radio 1.10.25.18
protocol version 52.56.25.29W
and since from the start I have bad GSM signal I have like 1-2 lines onli and it go up to 5line but onli from time to time (and then it drops again to 1-2line or none but If Itray to call is working or I get called but I can berly hear them bicose of the bad signal) on O2 network and in T-mobile is the same no mather wher I'm in town or outside of town; I'm in UK
is the phone damaged?? or...
sry for my bad english
Click to expand...
Click to collapse
I know I should've introdouced myself first, and that this is a strange first post, but:
HOLY SMOKES!!!
Xperia has FIVE reception bars????!!!!!
I always thought that 3 is the max value, since it only happened once that it went up to three bars, rest of the time it's maximum 2, usually 1.
I am also on Tele2 carrier, in Sweden that is, and since yesterday, I have no reception AT ALL.
Nothing.
Tried turning off 3G(or whatever it's called), nothing happens.
Tested with 3 other cards (one Tele2, one Telenor, one Telia) - all seem to be working okay. Except that the Tele2 one has slightly lower reception than the others.
Tested with 3 other phones as well - iPhone 3GS, Nokia 5800 Xpress Music, HTC Desire. All of them worked perfectly. Full coverage on that super-fast network thingy(the 3G symbol on iPhone).
Internet is just flowing on other phones - but Xperia is just falling behind in the most important section - reception.
Calls get dropped (2/3 of the calls), I must send same message at least 3 times in order to get it sent, Internet is crappy - if there's any at all.
Any kind of guidance is mostly appreciated.
P.S. A bit of those numbers which seem to be important:
Microsoft Windows MobileR 6.1 Professional
CE-OS 5.2.19608 (Build 19608.1.2.60)
ROM-version: 1.05.936.9
ROM-date: 04/19/09
Radioversion: 1.14.25.55
Protocol version: 1.0.11842.32680

Since all of you seem to have problems with one and the same carrier (Tele2) why don't you simply switch to another one? I once had a problem that was very alike the one described here and after several unsuccessful attempts of the carrier to fix it I simply switched to another one and all my problems were gone.

Dropped signal on v1615 t-mobile uk

I have a strange problem with my Kaiser, the signal with t-mobile uk keeps dropping, I have changed various radios and roms but still have the problem.
Current Phone is: V1615
KAIS130
SPL-3.34.Hard
CPLD-8
Current RomDA Ultimate X-V3 (but have tried anumber of others including stock t-mobile)
Current Radio: 1.70.19.09 (but have tried a number of others)
Any help would be appreciated.
p.s. Yeah on my first post, been a lurker for far too long.

Do you use 3G networking?, if not, try to change under Band menu to GSM network, it works pretty well and most places has good signal for it.
Good Luck!

I've had a nightmare with mine on T-mobile..
3 months ago, my phone developed a problem where it'd drop its network for a few hours, then I'd get a few hours of it working, etc. etc.
It was sent to T-mobile, who just re-flashed it. Still didn't work! Had it sent back and it was away a long time, I believe they replaced the motherboard.
It's been working perfectly for the last month until today - When it hasn't had a network connection the whole day! I'm worried it's still broken..
Hopefully our problems are network based! T-mobile warranty returns are terrible.

Aha! Changing my "Network Type" to GSM from Auto fixed things.
...But now when I receive a text, it vibrates until I reset!

jamiepyrite said:
Aha! Changing my "Network Type" to GSM from Auto fixed things.
...But now when I receive a text, it vibrates until I reset!
Click to expand...
Click to collapse
turn off vibrate

Hi Milmirex & Jamiepyrite, thanks for the comments.
I've changed to GSM and it has been working fine for the last ten minutes, will test for the rest of the day and report back.
Does anybody else have any idea's how to fix 3G problem? I receive emails all day so could really do with this being resolved.
Does anybody else have same issue but with different network? would possibly point to hardware issue if you do.
Thanks again.
P.S. I didn't have the problem with vibrating on receiving texts

I had flashed back to the original T-Mobile ROM when it was doing the vibrate thing. Flashed it again back to the ROM I was using before and all works fine now

jamiepyrite said:
I had flashed back to the original T-Mobile ROM when it was doing the vibrate thing. Flashed it again back to the ROM I was using before and all works fine now
Click to expand...
Click to collapse
Even I have the similar issues from last week. Mine is MDA VARIO III. Even after changing my band to GSM, the issue stil seesm to be there. For about 10 mins i get a weak sigmnal, then it disappears.
Where did you get the original TMobile Vario III ROM. I would like to reflash and see if it fixes the problem. Can you please direct me to the right place
Thanks
Shashi

I think my problem may be similar. I'm with Virgin Mobile but I think they use T-Mobile network.
Have had my Tytn II for over a year & haven't touched software or settings for several months & all has worked well. For the last few weeks I've had no signal in places that other people on the same network (using different phones) are fine. Sometimes if I reboot it comes back. I'm also now finding low battery a lot but I think that the signal issue is draining my batter as it seems to be constantly searching. I get low/no signal with a completely full battery so I don't think that the battery is the problem.
Might this be a H/W problem? Anything I can do to sort this?

i have the same problem. I use Telkomsel operator in indonesia. My Kaiser is HTC Brand.
Any idea why is this happen? Seems like A LOT OF Kaiser went bad this way
Anyone have solution?

im4u2nv said:
i have the same problem. I use Telkomsel operator in indonesia. My Kaiser is HTC Brand.
Any idea why is this happen? Seems like A LOT OF Kaiser went bad this way
Anyone have solution?
Click to expand...
Click to collapse
Yup bro, we had the same problems,
i had already try to use with XL, Indosat, and my own Telkomsel,
but still had this serious problems,until i switch phone mode into GSM
i use this gadget for 3G purpose now i must use only GSM
is there any solutions from HTC? I already count on the net and found a lot of problem like we had and still no solutions from HTC

SMS / Text Messages Sporadically Don't Come In

I have an unlocked british d5803 that I am using on ATT in the states. Every once in awhile it just stops receiving SMS. The SMS will eventually come in all at once at some point in the future, or if I restart my phone they will all come in. I haven't been able to replicate the issue. It seems to just happen at random. Today was the third time I have noticed it happen.
Has anyone else noticed this issue? At least I'm not losing any texts, they come through eventually, but it is still a real pain.

Ive been having the same issue. For me, my messages wont send out randomly?

I'm having the same problem as well. I believe that when 4G LTE service gets dropped, the phone doesn't allow texts/calls to come in through the lower bands. The texts eventually come in a few hours later all together. I'm going to try to do a sony software repair or return the phone.
I wish I could love this phone, but i just can't with this issue.

I would suggest downloading the advanced signal status app and comparing it with other phones.

lun731 said:
I'm having the same problem as well. I believe that when 4G LTE service gets dropped, the phone doesn't allow texts/calls to come in through the lower bands. The texts eventually come in a few hours later all together. I'm going to try to do a sony software repair or return the phone.
I wish I could love this phone, but i just can't with this issue.
Click to expand...
Click to collapse
That doesn't sound good. Where did you learn about this? I always tend to blame the network for any missing text problems rather than the phone. Last week, for example none of my texts were getting sent. So I tried my GF's iPhone on the same network and same thing was happening, so I assumed T-Mo was having a hiccup. It worked 5 minutes later.

I would use the FlashTool and install the US version software and give that a try. There might be some changes in the radio part of the US software to better connect to the towers.

I am just speculating. My work phone is also on AT&T so I have been using it to troubleshoot. I don't believe the issue to be a network problem.
I'm going to try flashing the US firmware as mentioned below. As soon as I comfortably figure out how. .

bigneck said:
Ive been having the same issue. For me, my messages wont send out randomly?
Click to expand...
Click to collapse
I've only had an issue with receiving SMS, never sending them. I think. I'll pay more attention, it hasn't happened again since I posted this. Maybe I just need to do a fresh power cycle on the phone every couple of days. Sucks, but wouldn't be the end of the world. It's a shame, this phone is perfect in every other way.
FSRBIKER said:
I would use the FlashTool and install the US version software and give that a try. There might be some changes in the radio part of the US software to better connect to the towers.
Click to expand...
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Can I do this if I'm unrooted? I don't want to lose my drm keys.

FSRBIKER said:
I would use the FlashTool and install the US version software and give that a try. There might be some changes in the radio part of the US software to better connect to the towers.
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Is this what you are referring to? http://forum.xda-developers.com/z3-compact/general/list-stock-firmwares-d5803-d5833-t2906706
Thanks again for your help

I am researching the Z3 C for use on TMobile/Metro and
GREATLY appreciate this honest description of this Problem.
AT&T nor Tmobile dko NOT seem to have this problem with Networks-it would be widely reported if they did.
I never had it on MetroPCS or MetroPCS Tmobile after Merger on Carrier LG Motion 4 G.
My theory is the Data Transfer is not automatically
reassigned or transferred to the lower speed 3G Bands for some reason, I am not a tech or,Dev so guessing that
Sony does not have Software Optimization tweaks that
we take for granted since they are not on many Carriers .
Guessing that the TMobile Z3 and Verizon Z3v will or have been optimized or will be for no data pause, text pause etc.
I can NOT have this because meetings are sometimes adjusted via text, phone used for Business.
Alpha probably even unlocked will have fewer issues , but never used an unlocked phone-
For RELIABLE texts, data, do you NEED a Carrier Branded, Optimized Phone.?

[Q] Losing signal completely

Hello. Have any of you experienced total signal loss? (The triangle in the status bar is hollow/empty). This happens seemingly on random and it "fixes" itself in a minute or so, and I can make calls and have mobile data.
Thanks

I have been also facing this issue lately with different roms. In my case, I loose the network and have to reboot multiple times to get the network up. Sometimes because of this, my phone shuts off. Not sure what is happening.

I flashed Dirty Unicorns a few days ago, and signal would drop every few seconds. Turns out the APN was set for MetroPCS, changed it to T-Mobile IPv6 and it fixed it.

I found my issue is related to my network operator. I am not sure why this happening, everytime I reboot or shut it down, I loose the signal and it takes many attempt's to get a connection. It could either be lollipop bug, network compatibility or issue with the device. Will find it out on Monday.

same here
I've been dealing with this same thing for two days. I have Sprint.
I was on Chroma and traveling. I noticed I lost data during my drive. Once I got to the location, my wife had full 3g and I had nothing. I thought it must have been from dirty flashing an update. I wiped and flashed again chroma with the sprint.zip for apn. Still didn't work. I occasionally would connect to 3g but would lose it randomly for long periods of time. I ended up walking around with my verizon hotspot to have data.
I just flashed stock and I've been waiting 10 minutes for it to try to activate. I'm hoping it will work this time. What a mess this phone has become.

It seems like it's a lollipop bug. I tested my sim on a different phone and multiple times, I rebooted without any issues. I wonder if Google messed with lollipop or is it Motorola.

matejilic said:
Hello. Have any of you experienced total signal loss? (The triangle in the status bar is hollow/empty). This happens seemingly on random and it "fixes" itself in a minute or so, and I can make calls and have mobile data.
Thanks
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Click to collapse
Yeah, even if there the signal bar gets empty, it doesn't interrupt in incoming or outgoing calls Even mobile data works perfectly fine. For me it comes to normal after 5-6 seconds

For me it does interrupt calls and I don't have mobile data. I really hope its a lollipop issue. I guess they can add that as number 1500 to the bug list...

I am currently experiencing that exact same problem no matter which rom I am using. It is really becoming a PITA. Spent 950$ for this POS phone.

Not a lollipop issue.
matejilic said:
For me it does interrupt calls and I don't have mobile data. I really hope its a lollipop issue. I guess they can add that as number 1500 to the bug list...
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Phillis said:
I am currently experiencing that exact same problem no matter which rom I am using. It is really becoming a PITA. Spent 950$ for this POS phone.
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Click to collapse
Few things to explain if you really want to find out what is wrong. Who is your carrier? Or you running stock or modified ROM? Are you rooted? Giving information like this may help you get to the problem. If it were a lollipop issue, don't you think everyone or at least a lot more people would be experiencing the same thing and posting about it???? Come on guys, be a little more precise when posting issues with said device.

vvveith said:
Few things to explain if you really want to find out what is wrong. Who is your carrier? Or you running stock or modified ROM? Are you rooted? Giving information like this may help you get to the problem. If it were a lollipop issue, don't you think everyone or at least a lot more people would be experiencing the same thing and posting about it???? Come on guys, be a little more precise when posting issues with said device.
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Hi,
WIth Fido in Canada. As some others have posted, if I choose LTE (recommended) in Preferred Network Type, I lost my connection every 15 minutes for 1 minute. If I set to 3g, all is fine. I tried the sim in my nexus 5, doesn't happen.
Tried CM and some other AOSP customs roms, always have the problem. Also tried different radios., same problem. I will definitely retry with the factory image soon, but I have strong doubts it's the OS. I contacted Google, they are sending me a replacement phone.
It's insulting to shell out 950$CAD for a new phone, have it bug on you, then have them ship you a freaking refurbished device. I have a 64GB midnight blue from the first Canadian run (I was one of the lucky bastards, or unlucky!). Then they wonder why people buy iPhones...yes they are very limited, but at least the damn thing works.
Almost every single Nexus I have purchased has given me problems (4-5-6-7-7(2013)). The only one that has yet to show me problem is the 9, but that was a gift for my mother, so she won't even notice if things go bad. I am definitely done buying a Nexus device when it is released...lol

Forcing 3G
Hey Guys,
I tried switching from Euphoria OS to Omnirom but no dice.
I deleted all unused APNs and forced 3G connection, rebooted and it seems to be stable for now.
Hope there's a better fix soon.

Got another nexus 6 from Google...same problem. Every 10 minutes LTE drops. POS....

No problems here.. Sounds like a network issue not a hardware problem.