topic Re: ICS: Network Drops, Refuses to Reconnect in Other/General

ICS: Network Drops, Refuses to Reconnect

thekaz — Fri, 14 Sep 2012 14:33:10 GMT

Hello. I previously posted when I had Gingerbread about a problem I had with the network. It drops (especially when I'm sleeping) and it refuses to reconnect unless I restart the phone. I was given advice that with an upgrade to ICS, the problem would be rectified. http://talk.sonymobile.com/thread/51316

But, even with an upgrade to ICS (Build # 6.1.B.0.544), I'm still having the same problem. Now, instead of my phone losing connection but showing full signal strength, my phone just loses connection and says I have absolutely no signal. With a restart, my phone is fixed.

When I had GB, I tried "reset to factory settings" AND "software repair" through the computer. But, I still had the same problem.

Any help would be very much appreciated. I'm getting very frustrated! Does anyone else have the same problem?

Re: ICS: Network Drops, Refuses to Reconnect

WBrisk — Fri, 14 Sep 2012 20:05:46 GMT

I´ve had my Xperia P only for three days and never run it on GB (I updated to ICS immediately), so I can´t compare. But I have in a similar way lost connection five times already, and in two of those cases the phone icon showed a strong signal, so I realized the problem only when I tried to make a call and nothing happened. I also had to reboot the phone every time.

What also bothers me is the flickering signal strengh: even lying still on the table it can jump from full to zero strenth, in an erratic tempo and without any obvious reason. I know that the signal in my house is rather weak, particularly - of coarse! - in my studio, where I use the phone mostly. But no other phone has behaved like this.

I could easily fall in love with my P, provided that I can trust it's there when I need it.

WBrisk

Re: ICS: Network Drops, Refuses to Reconnect

_alexdon_ — Fri, 14 Sep 2012 20:08:42 GMT

Maybe you are in an area with low network coverage.Have you tried setting it on 2G only?Or did you try to repair the phone using SUS or PCC?

Re: ICS: Network Drops, Refuses to Reconnect

thekaz — Fri, 14 Sep 2012 20:34:18 GMT

Hi! Yes, I've repaired the phone using Sony Bridge for Mac. I've also "reset to factory settings." I also called AT&T, my network provider, to re-register my cell phone to the cell towers. Nothing works, and I still periodically get completely disconnected and miss calls, texts and messages. I thought that flashing my phone from GB to ICS would work but nope.

Re: ICS: Network Drops, Refuses to Reconnect

WBrisk — Fri, 14 Sep 2012 21:16:12 GMT

Thanks alexdon!

I should have rememered: it´s the 3G/WCDMA signal that´s weak in my house. I had chosen the (default) setting "WCDMA/GSM", where WCDMA is the preferred signal. But if its only "preferred", why didn´t the phone automatically switch down to GSM rather than loose the connection? Anyway, now I downloaded the Power Toggles widget, where I can easily switch between the modes. My "home setting" will be only GSM.

Probably the continuous effort to catch a poor 3G-signal also caused a lot of power consumption, so I hope the battery will last longer now.

WBrisk

Re: ICS: Network Drops, Refuses to Reconnect

WBrisk — Fri, 14 Sep 2012 22:14:32 GMT

I'm a little confused with this compulsory "Data roaming" setting. On my earlier phone, a ZTE Blade (also called Orange San Francisco etc.) on Android 2.2, you could have "Data enabled" without having roaming turned on. Now I can´t. It's no big problem, since the moment I leave my country I would in any case turn both off, but I'm just curiosus to know whether this new setting is part of Xperia or ICS. Or whether I'm doing sometingin wrong here...

WBrisk

Re: ICS: Network Drops, Refuses to Reconnect

Uliwooly — Sat, 15 Sep 2012 02:22:01 GMT

Xperia P

HSDPA 850 / 900 / 1900 / 2100 - LT22i

AT&T 3G

850 / 1900

double check with AT&T regarding their coverage also do you have the correct apn settings?

Re: ICS: Network Drops, Refuses to Reconnect

_alexdon_ — Sat, 15 Sep 2012 10:09:23 GMT

Sometimes,it is better to set the phone on GSM only,depending on the coverage.If you set it on GSM/WCDMA,it drains battery just finding the more powerful signal.You can select the modes in your settings,but with that app it's just easier.And for the roaming,in ICS you can select in settings if you wish it to be active or not.

Re: ICS: Network Drops, Refuses to Reconnect

thekaz — Sat, 15 Sep 2012 15:24:48 GMT

Thanks. Sorry, I somehow managed to delete the response that you replied to.

I talked to Xperia customer service and what they told me is that my "LT22i" is not compatible with the American market, which should use the "LT22a" model instead. They told me that AT&T doesn't work well with LT22i, and that maybe I should try T-Mobile instead (I don't think I'm going to switch phone providers to just keep this phone.)

Also, like you said, the frequences for 3G AT&T match up with the frequencies that LT22i is capable of connecting to. So, I don't see why having an LT22i in the USA is a problem.

Third, this was not an issue when I first got the phone, so I don't see why this should be an issue with my phone model.

I'll try new APN settings but it worked before so I'm not sure why it won't work now. Frustrating, as I spent money on this device!

Re: ICS: Network Drops, Refuses to Reconnect

Uliwooly — Sat, 15 Sep 2012 20:15:51 GMT

that's because back in the days the "i" variants were different

an example

the Xperia Arc

LT15i HSDPA 900 / 2100

LT15a HSDPA 850 / 1900 / 2100 / 800 - LT15a

Xperia P

HSDPA 850 / 900 / 1900 / 2100 - LT22i

don't trust nor believe AT&T they will tell you that nothing work unless you get the phone from them.

Get a new SIM card (they are free) and enter the correct APN settings

settings -> wireless & networks -> mobile networks -> access point names -> MENU -> add New

Name: AT&T

APN: wap.cingular

Proxy: leave blank

Port: leave blank

Username:WAP@CINGULARGPRS.COM

Password:CINGULAR1

Server: leave blank

MMSC: http://mmsc.cingular.com

MMS Proxy: wireless.cingular.com

MMS Port: 80

MCC:310

MNC:410

APN Type: leave blank

MENU -> Save

Don't forget to mark the Correct Answers & Helpful Answers

unrelated topic, if you have some time please check this thread

http://talk.sonymobile.com/thread/44888

Re: ICS: Network Drops, Refuses to Reconnect

thekaz — Sat, 15 Sep 2012 22:06:05 GMT

Thanks!!!! I'll do that. I hope it's just some messed up APN settings. I'll play around with it to see if it has anything to do with it. Thanks again!

Re: ICS: Network Drops, Refuses to Reconnect

Uliwooly — Sat, 15 Sep 2012 22:24:12 GMT

anytime, don't listen to AT&T

Re: ICS: Network Drops, Refuses to Reconnect

thekaz — Mon, 17 Sep 2012 18:32:22 GMT

OK great. I tried maybe around 5 or 6 different APN settings that I found all over the internet for AT&T's network, including the one that was posted here, to try to get my phone to work. I finally found the exact APN settings that haven't led to a disconnect yet! It looks like the only difference is in what the "APN Type" says!

Thanks to everyone who offered help... really appreciate it!!

For anyone on AT&T using an Xperia, I'd recommend these found here: http://forum.xda-developers.com/showpost.php?p=27982934&postcount=2

Phone

APN: phone

Proxy:

Port:

Username:

Password:

Server:

MMSC:

MMS Proxy:

MMS Port:

MCC: 310

MNC: 410

Authentication type:

APN type: default

ATT

APN: wap.cingular

Proxy: wireless.cingular.com

Port: 80

Username:

Password:

Server:

MMSC: http://mmsc.cingular.com

MMS Proxy: wireless.cingular.com

MMS Port: 80

MCC: 310

MNC: 410

Authentication type:

APN type: mms

Re: ICS: Network Drops, Refuses to Reconnect

thekaz — Wed, 19 Sep 2012 14:48:29 GMT

Nevermind. Network and data disconnects after extended standby period and won't reconnect... better than before but every morning I have to restart. Ugh!

Re: ICS: Network Drops, Refuses to Reconnect

Johan — Thu, 20 Sep 2012 06:07:54 GMT

Unfortunately I think this needs to be examined at an repair center to be fixed. Contact your local support team for more information.

http://www.sonymobile.com/global-en/support/contact-us/contact-info/

Re: ICS: Network Drops, Refuses to Reconnect

thekaz — Tue, 25 Sep 2012 22:56:30 GMT

Thanks, Johan. Actually, I went in and changed my SIM card again and it looks like it's working. Even though AT&T gave me a brand new SIM card only 2 months ago, it may have been faulty. It works now, so thankfully it was my SIM card and not the phone itself.