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Z5 loss of network

I have a Z5 since release day using stock rom. The phone as been fine. recently i've noticed an issue with the phone loosing signal.
I can leave the house with a signal but then randomly throughout the day it will loose any signal and wont find any networks when i search manually. I have to then turn off the phone take out the sim card and reinsert and its ok, until it does it again.
I thought it may be a faulty SIM but i have noticed in Strava when I loose signal It doesn't know where I am so not sure if it is loosing GPS the same time i loose network coverage?
Anyone else had this?

I have the z5c and have been having intermittent problems transitioning off WiFi to mobile data and I end up without service until I restart the phone or title mobile data on and off. This will happen a few times a day when I leave the house etc. But it didn't happen every time.

vlcano57 said:
I have the z3c and have been having intermittent problems transitioning off WiFi to mobile data and I end up without service until I restart the phone or title mobile data on and off. This will happen a few times a day when I leave the house etc. But it didn't happen every time.
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Click to collapse
Thats what I thought mine was BUT even if i toggle mobile data on or off it deosnt work.
ive tried restarting and even that sometimes doesnt work so I have to turn phone off, remove SIM and reinsert and turn phone on.
I dont get why it would also stop the GPS/Locations from owrking. Looking at my google maps history it hasnt been tracking on there when i Loose signal. Looks like its a hardware issue.
Going to try and do a hard reset and see what happens

Let me know how that goes for you. Mine does fine with just a software restart. I wonder if your contacts on your sim reader is touchy. I also noticed I originally said I had the z3c....I have the z5c. Whoops

Did a software restore the other day.
Woke up this morning , no phone network, had phone network last night. Did a restart no luck, turned phone on and off and it got signal again.
I've booked in in for warranty repair as it must be hardware related.

Thats painful.

Sooo... UPDATE
Tired new SIM from EE, another refresh still no luck.
Sent the phone to Sony to repair

Did you repair your phone with pc companion?if not give it a shot.

gm007 said:
Did you repair your phone with pc companion?if not give it a shot.
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Click to collapse
Yeah That was the first thing I did was to restore the phone to factory settings. that didn't work

Sony have sent a replacement phone so should be getting that tomorrow.
Quick service. sent Monday they dispatched a replacement Thursday.

shaz2sxy said:
Sony have sent a replacement phone so should be getting that tomorrow.
Quick service. sent Monday they dispatched a replacement Thursday.
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Click to collapse
Have the same issue. Signal just goes randomly and does not come back until I reboot. Never had to remove the sim so far.
I did any software thing I could imagine, however no luck. I belief it is hardware related.
Best Regards
Johannes

Nexus 5 "No Service, SIM card ok"

I have a nexus 5 "hammerhead" running the latest version of android marshmallow 6.0.1 .
My issue is, the device wont detect any network signal. At first i thought it was a software issue so I downgraded to lollipop and kitkat but the same issue still exist.
All I see is the network provider name, and beside it 'No Service'. I really dont know what else to do, unless this is a hardware issue. Anyone here had experienced the same issue and have it solved? Or am I just going to have to turn this device into a tablet. -___-
p.s. The screen broke and was replaced, and after return of the phone this happened. Is it that the phone repair guy damaged my device?
Plz help!?

Is the imei okay? Are both of the antenna wires properly connected?

audit13 said:
Is the imei okay? Are both of the antenna wires properly connected?
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Click to collapse
yes i can clearly see the imei #. ..and about the antenna wires, yes both are connected but just that the white wire seems abit off. but i tested the continuity and it seemed to work.

The imei is the same before and after the repair?
Did you remove the motherboard and examine it for signs of damage or alteration?

audit13 said:
The imei is the same before and after the repair?
Did you remove the motherboard and examine it for signs of damage or alteration?
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Click to collapse
Yes I did. Motherboard checked out ok. Just can't understand why no signal tho. Wifi and Bluetooth works well. And to answer your question, yes imei # is the same.
Also, I was told that the phone fell before the screen replacement and that's when the issue started.

Even if the antenna wasn't connected, it should be able to pickup some amount of signal. If that's not the case then I'll just have to replace the cables and the lower PCB also the speaker area.

Maybe the drop caused a loose connection on the motherboard?
Did you try pressing against the antenna connection points on the motherboard with the back removed?

Well not entirely.. All I tried was checking the antenna wires (which I realized are just the WiFi antennas) and also, tried placing a copper wire in one of the testpoint area that's dedicated to GPRS.
Is it possible that the transceiver may be damaged? Or that's not possible from a simple fall.

Imei is not blacklisted?

Nahh I doubt it. Phone was purchased unlocked was working for a while.. Fell, signal went ..broken screen.. Then once the screen was replaced, inserted sim and it detected sim and also the network but won't gain any bars (service) nor will it detect any other providers.

I would check the imei just in case.

What would I compare that to, apart from what the phone telling me?
I'm registered on the cell network, but no service despite the adjustments of changing the network type or by dialing *#*#4636#*#* and making alterations there.

You can check the imei in swappa.

same problem
same problem with me sim detecting i can see card name but no service in signal bar wifi bluetooh all ok

Pretty wierd
razr003 said:
same problem with me sim detecting i can see card name but no service in signal bar wifi bluetooh all ok
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Click to collapse
Yeah pretty weird if you ask me. But if you do get a solution to that issue please share :good:

According to Rameeze87, possible hardware issue. Here's the link http://forum.xda-developers.com/google-nexus-5/help/nexus-5-network-signal-wifi-ok-t3310047
Had no idea couldnt duplicate threads, then again it did help to justify the issue.

same
Mine is doing the same thing. Once in a blue moon it will show full bars upon first inserting the sim for maybe three seconds and show provider then drop all the bars and say no service. Dont think there is a simple fix.

Having this issue right now with my wife's phone. Power button broke and was going through endless power cycling so I removed the power button. Got the phone working but will not connect to network. I have checked everything 20 times.
Any solutions?
Sent from my LG-H811 using Tapatalk

Yup.. same issue. Phone fell and no mobile signals since (sim gets detected). Everything else is working fine, checked the antenna wires and they are connected properly... Anyone here who was able to get the signals back?

similar issue here in the uk.
N5 phone worked fine for 2 years with a 3 sim.
i changed the knackered battery and that all works and charges ok.
but the 3 sim now wont work(but it does in my motorola moto g), the only sim that will work in my N5 is an O2 sim ???
why does one sim work but not another, the phone isn't locked to a carrier?....

A confusing problem with my phone's cellular network service.

Hey guys. I have an unusual problem with my phone.
I was using my phone one night while in bed, playing a game that requires online connection when suddenly, my phone slipped from my hands. I managed to save it from falling to the floor, but it hit the wooden frame of the bed in the process. I checked the phone out and noticed no problem with it. The screen was fine, nothing broken on the exterior. So I tried to go back to my game, but it complained that there was no internet connection. That was when I noticed the signal had disappeared and the phone displayed "No service". I tried turning airplane mode on and off........nothing, restarted the phone.........no change. I turned off the phone and went to sleep.
In the late hours of the morning, I switched it on, and was greeted with the "emergency calls only" warning. I tried removing and re-inserting the sim card, restarting the phone and when I tried everything I could think of, I did a factory reset on the phone. Still, nothing changed. So, to rule out the possibility that the service was at fault, I removed the sim and inserted it into my brother's phone. It worked as it should! I inserted my brother's sim into my phone, same thing. At times, I get "No service", at times, "Emergency calls only", even some times, I get "No sim card", when there's actually a working sim card in the phone. These led me to believe the phone isn't detecting sim cards, but sometimes, the phone recognizes my sim card and the signal shows up, but I'm unable to use mobile data connection, make or receive calls or texts, or even dial a code to check my airtime balance.
So I decided it was definitely the hardware that had developed a fault. But then, one day, I went to visit a friend quite far away from where I lived, and I took my phone with me. To my surprise, my phone worked flawlessly there. I was able to use data connection and was getting good speeds. I was able to call and text. I removed the sim and put in another sim and it was the same.........worked flawlessly. Now, I don't know what to think anymore because as soon as I got back home, I was again getting the No service/Emergency calls only warnings, and the same sims work in my brother's phone - my brother lives with me.
** I know (or think) it's not a software problem because it would have been resolved after I hard reset it. Plus, it all started when it hit the bed.
** I know it's not the service in my area because the sim works in my brother's phone and my brother stays with me.
** I can't decide if it's an hardware problem because sometimes it works, sometimes it doesn't.
Some facts about the phone (if it helps)
** The phone is rooted
** It uses a sim tray. The type that allows two micro-sims or one micro-sim and one sd-card.
** The phone gets hot when I use it extensively.
I'd appreciate any help. Thanks guys.

Same thing happend to my phone it would have a mind of its own but it turned out that out in an open field the phone works but if you get any kind of walls around your phone the network wod not work. This is caused by a hardwsre problem took it to the shop and git it fixed.

khalid2882 said:
Same thing happend to my phone it would have a mind of its own but it turned out that out in an open field the phone works but if you get any kind of walls around your phone the network wod not work. This is caused by a hardwsre problem took it to the shop and git it fixed.
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Click to collapse
Thanks for replying bro. I plan to take it out for repairs soon.

Problem with reception on my OPO

Hello,
I have a big problem with my OnePlus One: After it detects the SIM and I entered the PIN the phone isn't getting any reception. I tried multiple SIM cards. I am actually having a IMEI, tried all APNs, which are available by the providers and I even tried multiple ROMs (I have no problem with erasing data or so, 'cause it's my backup OPO)
But in each single ROM the One isn't getting a signal.
In the settings I can actually choose the providers so the chip/ module ist working (maybe interesting to know: I repaired the phone's screen, so of course i fully dissembled the phone and first i thought maybe I cracked some parts, but the motherboard of my normal OPO is working fine and gets reception WITH all of the parts from the backup phone. In the other way the "not working" motherboard is also not receiving reception with the normally perfect working parts.
So there are only two ways:
Some software isn't working perfect, especially the modems' one, because I can't connect to any network. (I already typed in "+#+#4636#+#+ to see if the phone is getting a signal and yes it does!)
OR some components of the chip on the motherboard broke by the repair, but because it is getting a signal this isn't this way I think.
So I am over. Do you have any hints like a special modem that I can flash?

hi have you tried resetting the oneplus one back to factory defaults

kallum7 said:
hi have you tried resetting the oneplus one back to factory defaults
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Click to collapse
only resetting to the defaults no, but this should also be done by flashing a ROM to a completely wiped phone.
But now I have done this, but this didn't change something.

Hey,
I have a similar problem but with 3 and 4g. It works for a while then it stops : phone shows full signal icon but I cannot make calls or connect to the web.
However my 2g works fine. Try downgrading to see if it changes anything?

Loladin0 said:
Hey,
I have a similar problem but with 3 and 4g. It works for a while then it stops : phone shows full signal icon but I cannot make calls or connect to the web.
However my 2g works fine. Try downgrading to see if it changes anything?
Click to expand...
Click to collapse
My problem is that I'm not even getting a signal in the notification bar. I am only getting a signal in the hidden menu (call *#*#4636#*#*)
A change between 2g/ 3g and LTE hadn't changed anything and a swap with the frequency via the hidden menu also didn't changed anything.

go to this link and try this method : http://www.androidbrick.com/oneplus-one-two-3-3t-5-mega-unbrick-guide-twrp-flashing/

kallum7 said:
go to this link and try this method : http://www.androidbrick.com/oneplus-one-two-3-3t-5-mega-unbrick-guide-twrp-flashing/
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Click to collapse
OK. I will try this than I am back at home and have access to a Windows VM.
Anyways thanks to any suggestions!

Make sure the antenna is plugged in.
Worst case scenario, IMO, is that your antenna connector has broken itself from the board at the trace level.

kallum7 said:
go to this link and try this method : http://www.androidbrick.com/oneplus-one-two-3-3t-5-mega-unbrick-guide-twrp-flashing/
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Click to collapse
Done, but nothing has changed.

moe6 said:
Make sure the antenna is plugged in.
Worst case scenario, IMO, is that your antenna connector has broken itself from the board at the trace level.
Click to expand...
Click to collapse
the antenna is working (screenshot)

Have you tried contacting oneplus's support

kallum7 said:
Have you tried contacting oneplus's support
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Click to collapse
They said the only thing that they can do is to "repair it", so they will replace it, but it would cost so much...

Noedig1999 said:
They said the only thing that they can do is to "repair it", so they will replace it, but it would cost so much...
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Click to collapse
So,before display change,network was working properly,and this happened just after display change?

Mr.Ak said:
So,before display change,network was working properly,and this happened just after display change?
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Click to collapse
No. It happend a week or two ago. I started my phone in the morning and there were 2 problems: The touchscreen didn't reacted to anytging, but the LCD was working and the signal icon in the notfication bar didn't showed anything. (I didn't use a pin with the SIM)
So I restarted the phone with a long press (about 10 seconds) on the power button.
Nothing has changed so I thought that the cables where loose or so.
I took it apart and disconnected every single connection inside. Put it all together then. Touchscreen was working again, but nothing has changed by the signal.
So as I already wrote:
So I swapped the motherboard with my other OPO and it happend.
So the antenna and bottom part is working.

Noedig1999 said:
No. It happend a week or two ago. I started my phone in the morning and there were 2 problems: The touchscreen didn't reacted to anytging, but the LCD was working and the signal icon in the notfication bar didn't showed anything. (I didn't use a pin with the SIM)
So I restarted the phone with a long press (about 10 seconds) on the power button.
Nothing has changed so I thought that the cables where loose or so.
I took it apart and disconnected every single connection inside. Put it all together then. Touchscreen was working again, but nothing has changed by the signal.
So as I already wrote:
So I swapped the motherboard with my other OPO and it happend.
So the antenna and bottom part is working.
Click to expand...
Click to collapse
Check the connection of network antenna again.It might be loose.

Problem solved. It were some "not perfectly working SIM cards" as my provider wrote me in a letter, which came with some brand new SIMs, which are working fine right know. Don't' know why they were all working in the other OPO, but now the problem is solved!
Thanks for any suggestions!

Noedig1999 said:
the antenna is working (screenshot)
Click to expand...
Click to collapse
I'd still check it physically. I practically tore my hair out for a few hours after receiving a friend's phone after having its screen replaced. Similar symptoms wherein you can ping for networks, there appears to be signal from the debug menu as well but it just wouldn't connect to a network. I suspect that once it tries to connect and sends the required voltage to do it it fails as the antenna isn't there. The board and the connector itself is a bit of antenna on its own + you may be in an area that has very good reception in general.

OPO Intermittently connects to 3G/4G, 2g network always working

Hello,
I have a problem with my OPO that has been going on for months now (I suspect it's hardware based? but not sure)
My opo can always connect to 2g network
My opo can only connect for a limited time to 3G/4G networks. If i change the network type, I get internet alright for about an hour or so. After some time or event (can't find a pattern), the phone is suddenly disconnected from mobile internet (even though data is ON), but my reception indicator is full. I also cannot place calls or get called: when I try calling, I get either a textbox "network unavailable" or the call attempt just ends on it's own without result. I'll call this state "fake 4g"
Here's what I have already tried:
-reboot, flash other rom, factory reset
-downgrade and upgrade TWRP back again
-messing around with 4636 (but i think i haven't tried switching to US band and back to EU - i'm from europe). Note: the interface shows precisely one cell tower when i'm connected to fake 4g
-going back full stock (flashing a version of cm prior to YOGPAS1N0) in order to update the radio. I even installed oxygen at some point
-pulling a logcat. However, this problem (other than the fact that i have only have a basic grasp of IT) is that I cannot exactly pinpoint WHEN fake 4g occurred without looking at the screen/placing a call. I managed to determine fake 4g came up between 4:55 and 5:46, which is still a heck of a logcat. In order to generate some logcat chatter, i've placed a few unsuccessful calls during fake 4g period (i've pinpointed those logs)
Does anyone have any idea as to the cause of this bug (not entirely sure it's hardware based because it works, well, sometimes...)? Or can anyone maybe tell me what to look for in that 50 minute logcat? I guess I can always have another logcat run in the weekend and check every 5 mins until i can spot fake 4g happening.
Note: I haven't opened it to check whether the antenna is plugged or anything (not that i would see much, i think). Anyway, i can always do it if need be.
Thanks in advance

I have been having a similar problem, the LTE range keeps fluctuating from zero to 3/4th to full from time to time, even when the phone is lying stable. Range appears well when on 3g. It isn't sim card based as iv'e tried various sim ,phone combinations.
Also i have noticed many topics appearing in the past few months regarding network issues ... some kind of a pattern ?

Ah yeah I forgot to mention that I tried the simswap trick too, to no avail.
So you're suggesting the hardware antenna might be of poor quality, that might be the case. If so, I suppose the antenna cannot be easily changed (ie incorporated in mobo or whatever).
Does anyone know whether antennae are prone to fail in general?

Loladin0 said:
Ah yeah I forgot to mention that I tried the simswap trick too, to no avail.
So you're suggesting the hardware antenna might be of poor quality, that might be the case. If so, I suppose the antenna cannot be easily changed (ie incorporated in mobo or whatever).
Does anyone know whether antennae are prone to fail in general?
Click to expand...
Click to collapse
Nope.If there hasn't been anything that could damage the hardware,no.
Have you tried changing firmwares?
https://forum.xda-developers.com/oneplus-one/general/firmware-modem-oneplus-one-t3462214

Even i am facing the similar kind of problem and posted my question here https://forum.xda-developers.com/oneplus-one/help/internet-issues-intermittently-unable-t3714911. One more thing to note is if you try tethering with laptop the internet works just fine (it happens with my device) . Even i have tried many combination with 4636 interface but i really can't understand the reason behind it.

Flash latest modem firmware... Then *#*#4636#*#* ..then on phone change signal to 3g only or LTE only..
Helped me from losing signal