topic ICS (4.1.B.0.587) signal lost: issue in XPERIA archive

ICS (4.1.B.0.587) signal lost: issue

danyto82 — Mon, 12 Nov 2012 14:07:49 GMT

I bought an xperia mini 3 days ago that had an android 2.3.4 version (4.0.2.A.0.62).

As soon as I connected the phone to pc companion it ask me to upgrade to new 4.0.4 ICS (4.1.B.0.587).

I know that android 4.0.4 have a bug related to a random signal lost during deep sleep. I found this bug on my xperia mini and I downgrade to 2.3.4 android version.

Someone have news on this issue?

Thanks in advance.

Bye.

Daniele.

Re: ICS (4.1.B.0.587) signal lost: issue

danyto82 — Tue, 13 Nov 2012 10:46:54 GMT

It is possible that noone have the same problem on ICS 4.0.4?

I always have more than 20% of no signal on Xperia mini.

Re: ICS (4.1.B.0.587) signal lost: issue

Glorifyday — Tue, 13 Nov 2012 12:19:51 GMT

I think I found some similar problem description on XDA-developers (I don't remember exactly where, probably somewhere in this thread: http://forum.xda-developers.com/showthread.php?t=1867828), but - luckily - I am not experiencing anything like that. Are you sure that this is a signal loss and not a spontaneous reboot?

How did you upgrade to 4.0.4? I use SONY Update Service (SUS) with fatory reset option. I trust this method more than the upgrade With PCCompanion, because the whole process with SUS is done while the phone is switched off - this should elliminate any possible resource conflits or access violation problems while upgrading.

Re: ICS (4.1.B.0.587) signal lost: issue

danyto82 — Tue, 13 Nov 2012 12:52:13 GMT

Hi Gloryfyday,

thanks for your answer.

I am sure that it is not a reboot.

My problem is more similar to this:

http://code.google.com/p/android/issues/detail?id=28133

In order to verify this issue I use no signal alert that advice me when the phone lost the signal, and, when the signal came back.

Re: ICS (4.1.B.0.587) signal lost: issue

Glorifyday — Tue, 13 Nov 2012 13:23:54 GMT

I see now... so the problem is deeper than I thought...

Bad news :-(.

Re: ICS (4.1.B.0.587) signal lost: issue

danyto82 — Tue, 13 Nov 2012 13:28:29 GMT

Do you have an xperia mini?

Don't you have strange behavior of signal graph?

Re: ICS (4.1.B.0.587) signal lost: issue

m4dj — Tue, 13 Nov 2012 21:09:11 GMT

I am using 4.04 (587) for a long time but I didn't noticed nothing strange about signal.

The only problem related to signal is when the phone is rebooted , it automaticaly switch to 3g mode. In this mode the signal in not so good here and as I don't need 3g I have to switch manualy to 2g network mode (GSM only).

Re: ICS (4.1.B.0.587) signal lost: issue

Johan — Wed, 14 Nov 2012 07:41:04 GMT

As this seems to happen independent of manufacturer I suggest that you continue this discussion in the code.google thread above.

Re: ICS (4.1.B.0.587) signal lost: issue

danyto82 — Wed, 14 Nov 2012 07:55:50 GMT

Thanks m4dj and Johan,

Yes, sure I can continue this discussion on code.google but I think that google resolved this issue in a new release (4.1.x). As I saw in the net is not possible to solve this issue without a new release.

Furthermore, I made other test for you and it seems that is only a reporting issue because of, if the phone lost the signal during deep sleep, there is no signal come back reporting until the phone don't leave the deep sleep mode.

What so you think, Johan?

Someone can reproduce this?

Thanks in advance.

Re: ICS (4.1.B.0.587) signal lost: issue

Glorifyday — Wed, 14 Nov 2012 09:20:12 GMT

Sorry, I hadn't much time to examine the Android issue. What to look for on a graph?

Re: ICS (4.1.B.0.587) signal lost: issue

Glorifyday — Wed, 14 Nov 2012 09:22:19 GMT

Johan wrote:

As this seems to happen independent of manufacturer I suggest that you continue this discussion in the code.google thread above.

Hi Johan,

As Xperias '11 are announced not to get JB in the future, we would like SONY to find a workaround to this problem.

Re: ICS (4.1.B.0.587) signal lost: issue

danyto82 — Wed, 14 Nov 2012 09:24:40 GMT

Thanks Gloryfyday,

under settings, device, Battery, if you click on a graph that indicates the system on time, the "mobile network signal" indicates with a red line the no signal range.

thanks.

Re: ICS (4.1.B.0.587) signal lost: issue

Glorifyday — Wed, 14 Nov 2012 09:32:36 GMT

I have red portions, but I am using underground garage with no signal and the red portions correspond more or less to moments when I am using it, so it seems normal. Anyway, I will check periodically for this.

Re: ICS (4.1.B.0.587) signal lost: issue

danyto82 — Wed, 14 Nov 2012 09:36:23 GMT

Ok thanks,

I noticed that until I don't use my phone, if it is gone in a no signal zone during deep sleep mode (long time in standby) also if the signal was come back a red line was drawn.

Re: ICS (4.1.B.0.587) signal lost: issue

Glorifyday — Wed, 14 Nov 2012 23:32:23 GMT

Hi,

is there any guide how to read the diagram? What do all colours mean?

Re: ICS (4.1.B.0.587) signal lost: issue

danyto82 — Thu, 15 Nov 2012 09:00:07 GMT

Hi,

good question: I don't know, it seems that the colours rapresent the intensity of the signal, for example green for a good quality signal.