topic Re: Constant loss of signal in XZ Series

Constant loss of signal

zhiwei — Tue, 17 Apr 2018 04:37:16 GMT

My phone keeps losing signal and won't connect back until i restart the phone, this can happen up to every hour. Whenever this problem happens, i would not know that i've lost signal until i want to use my phone as it does not show no signal, the signal bar either sits at full(but still no service) or empty(but theres no notification). All other services ie.wifi, bluetooth. works fine except for all services and setting related to phone signal.

Toggling airplane mode on and off doesn't work, pressing on search for network manually doesn't giv me any results, pressing on search for network automatically shows "registered on network" but i would still have no signal.

I've tried using xperia companion to repair the software, doing a factory reset, changing the preferred network type to every option and dialling *#*#service#*#* and *#*#4636#*#* to change the settings from there but problem still persists. Moreover i've already changed my sim card twice and even sent it to Sony to repair 4 times, they tried software repair, changing motherboard, software upgrade and lastly they did a 1 for 1 exchange of device but the problem still remains.

Re: Constant loss of signal

higwayman — Tue, 17 Apr 2018 08:22:28 GMT

change the default point of access to the mobile network to either 4G or LTE or 3G.

try it out and monitor individually.

all the best.

Re: Constant loss of signal

zhiwei — Tue, 17 Apr 2018 08:42:49 GMT

may i know how do i go about doing that?

Re: Constant loss of signal

Qatrium — Tue, 17 Apr 2018 08:52:34 GMT

@zhiwei

Settings -> Network & Internet -> Mobile network -> Preferred network type

Re: Constant loss of signal

higwayman — Tue, 17 Apr 2018 09:16:39 GMT

depending on which android variant u have , i am on 7.1.1 on a z5.

Settings ->More> Mobile networks -> Preferred network type

if u have otherwise android variant, look for Mobile Networks>Preferred network type.

Re: Constant loss of signal

zhiwei — Tue, 17 Apr 2018 09:25:11 GMT

im on android 8.0.0. i've tried all options under settings ie. 4G only, 3G only, 2G only, 3G(preferred)/2G, 4G(preferred)/3G/2G.

i even went into the service menu by using *#*#service#*#* and tried the 4G/3G option. All of which did not solve the signal problem.

Re: Constant loss of signal

higwayman — Tue, 17 Apr 2018 09:34:13 GMT

Last suggetsion i have is to have you try with a SIM card from a different operator.

Likewise, play around with the default network and monitor.

BTW, which operator's network are you on?

It will help if some other XZ1 user came on the forum to reflect similiar issue.

Re: Constant loss of signal

zhiwei — Tue, 17 Apr 2018 11:06:26 GMT

My network operator is Singtel.

Tried with other sim cards before which all works perfectly fine on other phones, including my own sim, except on xperia xz1 which gives the same problem

Re: Constant loss of signal

higwayman — Tue, 17 Apr 2018 13:20:21 GMT

I am almost out of ideas. You done everything that i could think of. Its very strange.

I don't think this would happen but if you willing to gave it a GO, try in another location, for example if your problem always occurs at home, try the testing at your working place or vice-versa.

Just to confirm that you have also tried using the SIM cards from M1 or Starhub and they are all gaving you the same problem on your XZ1 phone. Can you double confirm?

Finally, if all suggestions fails, call Singtel and ask if they could reset your mobile account.

Re: Constant loss of signal

amitdgp06 — Tue, 17 Apr 2018 17:28:36 GMT

I am facing the same problem from last 15 days. 1st i though there is a operetar issue but i have tried other operater sim card also but facing the same problem.. off sony...

Re: Constant loss of signal

higwayman — Wed, 18 Apr 2018 02:04:29 GMT

2nd occurence reported!

Anyone with same issue, please report with the following info. We need to have enough info if we want Sony to get any investigation started.

Country:

Operator:

Software:

Please indicate if you have already exhausted the "maybe solution" mentioned in this post and if any of those fix your problem.

Re: Constant loss of signal

zhiwei — Wed, 18 Apr 2018 03:37:57 GMT

Yes, i've tried SIMs from different operators.

For the account reset by Singtel, that was the first thing they did before they changed my SIM card the first time round.

As for location-wise, it seems to happen everywhere and anytime, home; work; parks; roofs, even when i was using the phone. Just this morning when i was walking to the bus-stop while using an app to find the bus timings(which works perfectly on all my past Sony phones), it loads for the first ~15s then the signal just dissappears in an instant, like i literally blinked and it was gone then i had to restart my phone.

Re: Constant loss of signal

higwayman — Wed, 18 Apr 2018 12:27:30 GMT

@zhiwei

i would approach Sony Customer Service again and get them look into your issue again.

You swap a new unit, you reset your account with the operator, issue is not limited to a particular location/area..... its really challenging to identify the cause and only the manufacturer has the expertise and tools to find out what exactly cause the problem. Go to Sony again.

I have no more suggestion to offer. Sorry!

Re: Constant loss of signal

zhiwei — Thu, 19 Apr 2018 09:32:34 GMT

Sigh.. On the 4th repair, before they put in the request to replace the phone, they said their engineers couldn't find any faults thou...

But I will try asking again. Thanks for your assistance anyway!

Re: Constant loss of signal

Rolheads — Fri, 08 Jun 2018 00:11:45 GMT

Experiencing this as well. Sudden empty of phone signal. You're only choice was to restart the phone. No issues with wifi or other else, only this network signal. My xz1 is only about a month old. Havent try other operator or other simcard. Im using singtel. Im a sony fan since ericson. So i guess i just have to cope with it, restarting the unit everytime this happen.

Re: Constant loss of signal

NgocNguyen — Sat, 10 Nov 2018 13:18:19 GMT

i got the same issue with my xperia xz1. It's mobile signal frequently loss in 30 seconds then got back again. Espencially when i drive or move faster. My device: G8342, country Vietnam, android version: 8.0. I've just bought this a month ago.

Re: Constant loss of signal

Minsm14 — Thu, 15 Nov 2018 14:10:44 GMT

Hi I had been with the same problem since February this year but in the same (home) . My network had a few issues with the masts but solved the problem for a few days . I already chance my phone and my sim card 3 times.

Still have the same problem dropping calls no signal or no service.

Model: G8341

Android sistem: 8.0.0

Country: United Kingdom

Re: Constant loss of signal

Alekss07 — Sun, 30 Dec 2018 10:42:10 GMT

Та же проблема была несколько дней , с 4G пропадала моб. связь,когда перешел на 3G и GSM моб.связь стала отличной. Эта проблема появилась после последнего обновления ПО в декабре 2018г. Украина, г.Винница

The same problem was a few days, with 4G disappeared mob. communication, when switched to 3G and GSM mobile communication has become excellent. This problem appeared after the last software update in December 2018. Ukraine, Vinnitsa

Re: Constant loss of signal

JAI0073 — Wed, 12 Jun 2019 06:10:29 GMT

I have the same issue dated 2019 06 11 with Singapore Singtel. After changing a new Singtel SIM card, the result is still the same. This does also happen to Singapore M1 sim however Z5 will request restart due to an operator like to optimizes the settings. Both signal strength is very low as the picture showed.

Country: Singapore

Operator: Singtel

Software: 7.1.1

network operator does not have coverage in this area or the SIM card is deactivated

SIM deactivatedPhone: Z5 E6653

Re: Constant loss of signal

Oldnick666 — Sun, 15 Dec 2019 06:48:14 GMT

This happens with all Sony phones after a while. It happened to my T2 Ultra which made me upgrade to the XZ Premium and now it is starting to happen to it. It affects the sim card the micro SD slot and the wifi. I can only assume that all three are part of the same area on the pcb board. I think nobody has really known about it since nobody keeps their phones for that long of a time but is and has been a problem with all Sony phones for the past 10 years or more. Maybe some day the engineers at Sony will figure it out. Until then the only solution is a quick restart until that doesn't work any more and it's time for a new phone.