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Inabuilty for Simultaneous Voice and Data

Why is the Nexus One unable to do Simultaneous Voice and Data.
I have searched hi and low.
And yes i am in a 3G area and all that jazz.

donniesd said:
Why is the Nexus One unable to do Simultaneous Voice and Data.
I have searched hi and low.
And yes i am in a 3G area and all that jazz.
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It is.........

hah2110 said:
It is.........
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Well by all means please tell me how!
And dont dear say wifi!!!

donniesd said:
Well by all means please tell me how!
And dont dear say wifi!!!
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What do you mean how? If you are on 3G... it just works.

hah2110 said:
What do you mean how? If you are on 3G... it just works.
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I am in 3G.
I have no problems when putting my sim in my tp2. And talking while surfing.
And i am not the only one. No one has givein a reason as to why.

Uh..unless you changed you radio settings to "WCDMA only" you should be able to talk and surf.

It should work. I do it all the time, but it is network dependent.
In case it works on your TP2 i suggest you check your settings.

Hey big guy are you using a t-mobile nexus one on AT&T? Or AT&T N1 on T-mobile? That used to send all my calls to voicemail while I was on the intarwebs

JCopernicus said:
Uh..unless you changed you radio settings to "WCDMA only" you should be able to talk and surf.
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Incorrect. "WCDMA only" is still UMTS/HSPA (3G/3.5G in consumer speak), therefore you still get voice/data at once. I can only conclude that you're under the assumption that UMTS/GSM work the same way EVDO/CDMA does. On an EVDO network, all data goes through the EVDO network, while voice stays on 1xCDMA, because EVDO is an addon to 1xCDMA.
UMTS and GSM are two completely incompatible technologies that only share GSM backend features and a SIM card. The circuits in the phone are separate, the antennas on the towers are separate. You're either completely on UMTS for voice and data (inc. both at the same time) or you're completely on GSM (for voice or data but not both at once. In fact, if you're locked on to a strong UMTS signal, the parts of your phone that handle GSM shut down for power conservation and only wake up when your signal drops to check to see if you'll get a superior signal over GSM. It will do this periodically, but won't stay active for long unless your UMTS is so bad that you won't be able to hold a call. THEN your phone powers up and maintains the GSM radio, while putting the UMTS radio on standby, only powering it up momentarily to look for a better signal.
The only time you have GSM and WCDMA/UMTS powered on at the same time is during hand-offs from one network to the other. That's why staying in areas where you bounce between the two kills your battery so quickly, the radio is drawing roughly twice as much juice as it normally does, plus it's computing which one will do the better job for the moment. Even then, at that time, the phone and its OS will be using only one of the networks at a time, and if it's UMTS, you'll be able to hold a call and surf the web.

rx7freak said:
Hey big guy are you using a t-mobile nexus one on AT&T? Or AT&T N1 on T-mobile? That used to send all my calls to voicemail while I was on the intarwebs
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TMO on TMO.
Attached are my settings.
I have this on every rom or radio i try.

Hey, sort of same thing just happened to me
in my case using GSM Auto (prl) or WCDMA prefered I can connect to HSDPA but GSM is in emergency calls only, weird.
but I can do both on GSM only (GPRS/EDGE)

Re-flashed to official release of 2.1 same thing.

i use voice and data on my nexus at the sme time every day. it just works. as long as you have a 3G symbol next to your reception bars, then it works.
i dont know what you could have done to break this. can you demonstrate to us what you are doing that is not "working"?

RogerPodacter said:
i use voice and data on my nexus at the sme time every day. it just works. as long as you have a 3G symbol next to your reception bars, then it works.
i dont know what you could have done to break this. can you demonstrate to us what you are doing that is not "working"?
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I am connected to 3G network. Call comes in. I can not browse on the internet. While i am on the call i go check settings and i have droped to GPRS. As soon as i hang up i go back to 3G (HSDPA)

Have you ever changed your build.prop file at all in the past? If so that's the problem. Change to hsxpa=2 to fix it.
If not then I have no clue.

RogerPodacter said:
Have you ever changed your build.prop file at all in the past? If so that's the problem. Change to hsxpa=2 to fix it.
If not then I have no clue.
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It is.
I have no problem on my TP2.

I use it often too but today I was unable to it. Hopefully its because my area is being updated to hsdpa+

i think i have the same problem. 3G drops during voice call, doesn't connect during the call. reconnects after the call ends.
stock nexus one tmobile FRG83D

When you have bad reception, that's what happens. Normal and expected. During the call it won't re-negotiate 3G, only when the call ends.

Jack_R1 said:
When you have bad reception, that's what happens. Normal and expected. During the call it won't re-negotiate 3G, only when the call ends.
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Yeah, that is normal and it really sucks when you're on a long call. Once you lose 3G signal it's gone for good. I don't know if it's a network problem, or the phone, but it should be fixed.

Improve latency: Tmo prepaid 3g

Is this true?
From: http://forums.androidcentral.com/go...ne-tmobile-prepaid-you-need-data-roaming.html
6tr6tr wrote
I was having issues with poor latency/delays and slow connection speeds with TMobile. I called them and they said even though prepaid 4G doesn't have data roaming, if you have data roaming turned off on your phone, it won't get full 4G speeds. I didn't believe them but decided to try it. My speed went from 3mbps to 13mbps! I then had a friend (on an HTC One S) do the same (he also had data roaming off) and he saw the same boost in speed!
** IMPORTANT: for this to work properly with the network, you need to reset the APN to default after turning on data roaming.
(They assured me that we won't get charged for data roaming because the account doesn't have that enabled for other providers)
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I tried it, but didn't notice any difference. Why don't you give it a try?

Just did it... not sure if placebo or not but I seem to be getting a *tad* bit better signal in my office (which is usually a blackhole)

yeah.... placebo.
If anything, resetting the APN would impact things as traffic for various APNs gets handled differently and may result in lower pings or higher speeds.
For the most part though, the only thing that affects pings on a handset that you have any control over is the radio firmware being used or the handset reception due to how you hold the phone. The rest is regulated by the load on the cell (tower) you're attached to, backhaul supporting the tower, and the APN you're using which directs traffic appropriately through the network.

converge12 said:
Just did it... not sure if placebo or not but I seem to be getting a *tad* bit better signal in my office (which is usually a blackhole)
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reuthermonkey said:
yeah.... placebo.
If anything, resetting the APN would impact things as traffic for various APNs gets handled differently.
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You got handed a sugar pill..
Data roaming, affects "data"... It wouldn't make the difference to your signal bars. Signal fluctuates way too much to even compare, even standing in the "same" spot, holding the phone with the same hand facing the same direction...

Thanks for posting this. Normally my speeds were 0-1.xMbps but after trying this I've gotten 6.87Mbps down on my 1st test.

clockcycle said:
You got handed a sugar pill..
Data roaming, affects "data"... It wouldn't make the difference to your signal bars. Signal fluctuates way too much to even compare, even standing in the "same" spot, holding the phone with the same hand facing the same direction...
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getting H instead of 3g affects data, no?

No signal weird letters RSSI

Hey all,
So the issue is gone but still curious. I had no signal one day after class. All I saw was, no signal, even though my carrier logo was displayed. Tried loading internet but nothing.
Shortly after RSSI was displayed on the signal strength tile. I still couldn't place Phone calls or use the internet.
I'm suspect of my carrier AIO - AT&T having several mini outages and not telling customers based on previous situations so I'm investigating. Thanks for the help!!
Image is attached..
Sent from my XT1053 using xda app-developers app

RSSI = received signal strength indicator.
Displaying the letters is a little strange though, sounds like a software glitch of some sort.

I have had exactly the same thing happen on my android mobile on kitkat in the last few days. I have noticed it on at least 3 occassions and it always seems to happen late at night when I have stopped using the mobile. It is very odd! I used Google to find the answer and it lead me here. Would love to know what it is and why it's happening.
BTW my phone is a moto g

my opinion; RSSI is displayed because you dropped your carrier. being a GSM carrier, it's possible you tried connecting to someone else's faint signal but never authenticated. this is all speculation, but hypothetically possible.
in other words, as long as you re-authenticate to your carrier, it's a non-issue.

Very strange, but I have a signal when it is happening to my phone and it is happening a lot lately, especially in the evening and then quite often as soon as I spot it it disappears. Starting to make me think something odd is going on.

well.. your image also shows "emergency calls only" which supports the theory that you've dropped carrier signal altogether. I believe you're right that believing that it has to do with the ATT/AIO service outtage.
but why RSSI instead of any other message... is another question altogether...

640k said:
my opinion; RSSI is displayed because you dropped your carrier. being a GSM carrier, it's possible you tried connecting to someone else's faint signal but never authenticated. this is all speculation, but hypothetically possible.
in other words, as long as you re-authenticate to your carrier, it's a non-issue.
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aldouse said:
well.. your image also shows "emergency calls only" which supports the theory that you've dropped carrier signal altogether. I believe you're right that believing that it has to do with the ATT/AIO service outtage.
but why RSSI instead of any other message... is another question altogether...
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Steve-x said:
RSSI = received signal strength indicator.
Displaying the letters is a little strange though, sounds like a software glitch of some sort.
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I do think it is a software glitch but it's very inconsistent. I feel strongly it's a Moto X or maybe Motorola firmware thing. With AIO I kept losing signal, so I left them and with T-mo now I and I experience the low signal rarely, and low signal here and there.
EDIT: I also still have some MMS issues w/ T-mo & AIO. not working, also inconsistent which I think is another firmware bug. Any of you guys have some clever ideas on how to troubleshoot this? Where would you start?
I'm rooted with R/W access and willing to dig thru system's files! apk's, whatever! Because this def is a problem and I would like to solve it.

drago10029 said:
I do think it is a software glitch but it's very inconsistent. I feel strongly it's a Moto X or maybe Motorola firmware thing. With AIO I kept losing signal, so I left them and with T-mo now I and I experience the low signal rarely, and low signal here and there.
I also still have some MMS issues. Not working also inconsistent. Any of you guys have some clever ideas on how to troubleshoot this? Where would you start?
I'm rooted with R/W access and willing to dig thru system's files! apk's, whatever! Because this def is a problem and I would like to solve it.
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I would also mess around with manual network selection while I had AIO so that could explain the weird signal stuff, here's the app I used in addition.
https://play.google.com/store/apps/details?id=net.andirc.lteonfoff

Strangely enough I've got this showing up in Airplane Mode on my Moto G as well (Verizon Prepaid activated but never paid for service). Also one night at random I noticed I had 3G showing up instead of just bars and used 250mb of data for free which was weird.

Try to specify carrier
Hey,
Please try to specify which carrier you prefer so your Moto X will not try to connect to alternative carrier with stronger signal.

Signal but no bars

I am using about unlocked and rooted US Cellular phone on T-mobile. It's working and I get clear calls, but I do not get any visual "bars". It's not a major concern, but the OCD kicks in now and then... lol.
Any idea how to fix this?

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Breach said:
Any idea how to fix this?
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US Cellular is CDMA and T-mobile is GSM. I am surprised it even works but my guess it's that your phone does not know how to read the signal and or does not have a symbol to use.

Attached is an image showing what I am describing. Also an image showing that I have it at for Global. I also tried Lte/Gsm

Why turning flight mode on and off is required to get data?

Dr ketan m12 but I've had this issue with heaps of roms and even my old note3.
I'm with Vodafone Australia in a semi rural area but whenever I am away from wifi my hspda icon will show up as if I have a connection but when I try a website it never loads. I'll try a bunch of times and nothing.
Until I turn flight mode on and the off and then it goes straight away.
Really annoying, any ideas?

Maybe an issue with Wifi-cellular handover being buggy. Try turning this feature on/off and then see.

You mean smart network switch? Already off.

defroster said:
You mean smart network switch? Already off.
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Does the connection work on other phones without issues? If so, then this could be resolved by resetting the network settings from the carrier. I've had similar issue on the S3 and resetting the settings from my carrier resolved it for some reason. I feel this has a good chance to work for you as well.
Does it occur on stock ROMs well?
Does your area get sufficient coverage for 3G/4G data? The phone will sometimes show that 3G/3.5G/4G data is available but may not necessarily work. I've seen this happen in out-of-town areas ofn Pakistan where cell towers are far apart. This wasn't much of an issue with urban areas for me.

How do you reset carrier network connection?

defroster said:
How do you reset carrier network connection?
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Contact the carrier's customer care and ask them reset the network and send new settings to your phone.
That's what we do here but I'm sure it's more or less the same.