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GPRS and Phone calls

I upgraded to 2.24 Tmobile official beta ROM. and it seems that I cant get phone calls while im streaming thru EDGE/GPRS not just streaming also like browsing and stuff, phone calls go straight to voicemail, is this how it was on 2.17 or 2.21 ? Because I tought it worked before !!!! Can anyone confirm please...

Can some one please verify regarding this, can some one just try browsing somethign and call them selvs and see if it goes straight tru to voice mail on a diffrent ROM please....

Yozh:
I had an 8125 on the Cingular network running Summiter's 2.17 ROM, and the phone call always interrupted any web surfing I was doing, and/or disconnected IM+ (which uses gprs/edge).
That phone broke (d'oh!) and I got another one that was running the stock ROM. Same thing.
I now have a new 8125, and just upgraded to Summiter's 2.3 ROM (thank you Summiter!), and the phone acts the same.
I've never experienced an issue where the phone call goes directly to voice mail... that I know of.

Very strange, I tought thats what mine used to do before the 2.24 ROM it used to interupt the GPRS session for a phone call. ANyone else that can confirm that this is just an issue in 2.24 ROM ?

Anyone else that can confirm this ?

Or maybe there is a registry setting for this ?

I have always thought it depends on what your gprs connection was doing.
if it is connected but idle, then calls will come through. if it is connected and in use, downloading a file or something, then it won't be interupted by a call.
as far as I know, this is the way gprs was desgined to work. can anyone confirm?

I dont want to go back to the 2.17 ROM just to test this. But it looks like no one out there would do it for me .... I could of sworn that it worked before..

yozh;
I have the same ROM and I DO get my calls, they DONT go to voicemail.
It's not the rom. Its the way GPRS works. Try to download constant packets of data(like streaming a high quality video) ON ANY ROM and try calling you at the same time. it can and it WILL go to voice mail.
That being said, sometimes you might be downloading a lot of data and you phone MIGHT STILL RING! This is because GPRS uses multiple different channels than then one used for voice, but this feature is just a plus, its not something you can always rely on.
Just something i wanted to add: This rom had brought me incredible reliabily on my GPRS connection and, paired with the cingular radio rom, its close to perfect for me. Maybe because with this rom the GPRS is always working full-speed and optimized, pushing the MOST of data it can, calls might be going to voicemail more often than normal? Its just a thought and maybe its a stupid one, but on my understanding the more data its pushing, the greater the chances it will go to voicemail.
Hope that helps.

Strange because MDA is class B device and class b device should
Class B
Class B mobile phones can be attached to both GPRS and GSM services, using one service at a time. Class B enables making or receiving a voice call, or sending/receiving an SMS during a GPRS connection. During voice calls or SMS, GPRS services are suspended and then resumed automatically after the call or SMS session has ended.
Click to expand...
Click to collapse
thats from http://www.gsmworld.com/technology/gprs/class.shtml
So thats kinda strange Im telling you Tmobile is doing something, I need someone with 2.17 or 2.21 to check this please[/quote]

Similar problem with 2.25
I just updated to 2.25 ROM and have a similar problem. In this case, it seems that once I make ANY GPRS connection, the voice channel no longer works. Outgoing call just don't connect and incoming are directed to voicemail. It still indicates a strong signal to the Cingular netowrk, and data apps still work (for example, the voicemail notifications and email keep coming in). I have to stop the data comm and then cycle the phone (voice) connection in order to get voice back.
Any suggestions? Cingular is advising me to downgrade back to 1.8 ROM - but they don't even have a link to get it!

What programs are you using?
See this thread: http://forum.xda-developers.com/viewtopic.php?t=53432
It documents the problem...

Why incoming call is blocked while GPRS is in transmission?

hi all,
i got a very annoying "feature" in the O2 Cosmo(T-Mobile Dash). The incoming call will be blocked(heard busy tone) if the GPRS is in transmission. I was complained by many friends.
To my understanding, there's a setting in some phones to enable both GSM/GPRS concurrent connections. Is there such setting in Windows Mobile?
My ROM is 1.13.207.2, RADIO is 4.1.13.28_02.63.90
i tried to refersh its ROM, but don't know how to CID unlock. the "RUU_Excalibur_SPL-1.11_UpgradeOnly.exe" on the server has no luck for me, still "Invalid model ID".
can anythone show light on me?
thank you

reply
I think microsoft released a patch for that: i'll try find it on google for you. can you explain what configuration you used?

I think the 'patch' you need is called 3G.

I have the exact same problem and I opened a thread on it as well.
Read here.
The conclusion we reached was that this is a network, not phone dependent problem.

yeah never happent to me ever

thanks for all the replies.
My previous phone is O2 XDA Mini S(Wizard). I used that one to receive push mail provided by GoodLink, which requires GPRS always on. I didn't have such issue with that, at least no complain from my friends.
That's why i am wondering something wrong with the RADIO configuration. I didn't make any specific change to my new O2 XDA Cosmo(Excalibur).
best regards

And back to my memory.
I used to have the classical Ericsson T39. There was a setting to enable GSM incoming call during GPRS transmission(cannot remember the exact name). By enable that, i can still receive incoming call, and the GPRS connection will auto resume after the call.
Is there similar setting for Windows Mobile?

There is not as far as I've ever known. I've used smartphones that determined which was blocked and which was not based on which application was in use at the time. That is, if you were actively using IE or some other network app, phone calls would go straight to voice mail. If a non-network app was front and center at the time, the network would be disconnected and the phone would ring. That (and the SE settings mentioned above which I saw on my SE phones too) showed that it was a phone setting made by the carrier. I'd hope there's a little more intelligence behind it than just "voice trumps network" but if there is, I couldn't tell you what determines which gets through and when.

I've found that it's based on the amount of data being transmitted at the time of the (attempted) call. For example, high-bandwith usage such as media streaming will lead to the incoming phone call being blocked/diverted most of the time, whereas sporadic usage (eg. PING, or loading a very simple web page) has allowed a call to come in, temporarily disabling GPRS. GPRS can never be used during a phone call.

Phones does not work when dat connection is active

Hello Everyone,
I am having a wierd issue with my HTC Tytn.When my Data connection is active I cannot make or recieve phone calls.Any incoming call goes straight to voicemail and any number I dial the phone will display "call ended" before it even starts to to ring. The minute I close the data connection the phone works again.I have updated my ROM to the latest English ROM.Could my unit be defective?
Thanks in advance!!!

Hmmm that's weird.
Your TyTN is acting as class C device (Data or Voice), and in fact TyTN is class B device (Data is suspended while on Voice).
Is your unit defective? Possible, but... first backup your TyTN completely, then re-update full ROM, set up data connection and call to check it while on active transfer. If it will be OK - your unit is OK and this is software/registry problem, if not your unit is might be defective. This is the quickest way to determine.

My device does this as well, but only when connected to Slingmobile.
Other "always on" programs are not affecting me.
Not sure if this helps or not Just trying to add more data.

data causing call dropouts
Hi,
Hope this helps, but here in Australia when using the Telstra HSDPA network on UMTS850, when i'm connected to a data session, I can't receive calls and the caller gets the "phone is switched off" message. If I force the phone to use the old UMTS2100 network, the phone will pause the data session and allow the incoming call. On another forum I have read that this is due to a limitation in the Ericsson 850MHz hardware which the telco is using on their mobile towers and they expect an upgrade to fix it sometime in January. I don't know if this is 100% true, but it is what i have read

If I have a data session in progress it gets disconnected whilst a phone call is in progress (I can receive calls fine, although I have had one or two occasions when people have rung me and it's gone straight to voicemail without notifying me of the call). After I hang up, the data session is reestablished.
Using T-Mobile in the UK for what it's worth.
This is a very weird issue, sorry I can't offer any more info or advice.

I'm on T-mob Flext WnW and have the same issue. When I have my data connection established (either gprs or HSDPA) anyone that tries to call goes straight to voice mail. I can make a call which temporarily stops the data session and then re-establishes it after I hang up.
Is this a known issue on T-mob?

In the HTC faq, it is meantioned that the handset is a GPRS class B device:
http://www.europe.htc.com/support/faq.html?id=119
This means that the data-traffic is suspend for voice calls.
http://www.gsmworld.com/technology/gprs/class.shtml
(I haven't tested this with my HTC, but my Nokia 6260 did behave like this)
The HTC faq also states the full 3G operation ought to allow for simultaneous voice and data calls. I personally interpret this that calls are possible together with a UMTS connection (but I could be wrong).
Jörg

For all with problems with connection while on data.
Most of us here have no problem with it, might be network you are logged, not fully compatible with class B.
My advice: check different phone (TyTN) if same occures, if yes then different handset (other brands). If it still is happening - call network and demand some explanations and upgades.
Still supporting my first post to hard reset device and check if without all software you have same problem.
And for the record - most of mobile operators calls this "Ring-through problem"

JUST FYI
Cingular says that for some reaosn streaming data (for my my slingbox) will not interupt. So phone always goes to voicemail.
Once I get the higherspeed data in my area this problem should go away.
This was posted by another in response to my question, and also confirmed when I called Cingular. Although it is possible we were both misinformed by support.

Trinity data link and lost calls problems

Hi all
I am wondering about the purchase of a Trinity. Someone, on an italian forum, has posted the problem of incoming calls lost (the caller receives a busy line signal or the phone results unreachable) while the phone has a data connection active (apparently only an HSDPA one). Has any one observed a similar problem ?
Thank you everyone.

hawk971 said:
Hi all
I am wondering about the purchase of a Trinity. Someone, on an italian forum, has posted the problem of incoming calls lost (the caller receives a busy line signal or the phone results unreachable) while the phone has a data connection active (apparently only an HSDPA one). Has any one observed a similar problem ?
Thank you everyone.
Click to expand...
Click to collapse
This is standard behaviour when transferring data over 2G GPRS. It should not happen on 3G. I have received phone calls while using 3G data and the phone rang as normal.... I can't report about HSDPA (is there a simple way to check if HSDPA is actually used?)

anonimo said:
This is standard behaviour when transferring data over 2G GPRS...
Click to expand...
Click to collapse
No, it's not, voice calls always have higher priority even in 2G networks.
Can someone else confirm this issue with Trinity?

banesi said:
No, it's not, voice calls always have higher priority even in 2G networks.
Can someone else confirm this issue with Trinity?
Click to expand...
Click to collapse
Well.... it's the third time in a few days in this forum that I post something and I am told that I am wrong. The previous two times in the end I happened to be right, so according to statistics I should indeed be wrong this time!
However I think I might be right this time too! The standard behaviour with GPRS sessions is that they are interrupted when they are idle and an incoming call is received; if data is being transferred then the phone will be busy.
Obviously for outgoing calls the phone will stop the data session when you want to make a call.
(All this for GPRS on GSM)
PS: You don't believe me try to use a GSM phone as GPRS modem for a PC, start a large file transfer and try to receive a call.

anonimo said:
PS: You don't believe me try to use a GSM phone as GPRS modem for a PC, start a large file transfer and try to receive a call.
Click to expand...
Click to collapse
Well, since I use GPRS internet for more than 3 years actively and have changed a couple of phones already I must say that GPRS system is projected in a way that voice calls are priority in any situation. In this years I have found that sometimes my phone is not reachable when I'm connected to a GPRS but that percentage is rather small, could be some other problems related to a base stations.
In your case I would think of contacting your operator, change phone or just change a carrier, being unreachable during GPRS sessions is something that I will characterized as bug, at least. NHF

banesi said:
In your case I would think of contacting your operator, change phone or just change a carrier, being unreachable during GPRS sessions is something that I will characterized as bug, at least. NHF
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Click to collapse
You are right. It was a very common bug in the early Class B GPRS phones and I thought it was supposed to be like that, but indeed even a class B device should suspend the data session and ring when a call is received.
However I am reading in other forums that this is now happening again with HSDPA.... the joy of early adoption

anonimo said:
You are right. It was a very common bug in the early Class B GPRS phones and I thought it was supposed to be like that, but indeed even a class B device should suspend the data session and ring when a call is received.
However I am reading in other forums that this is now happening again with HSDPA.... the joy of early adoption
Click to expand...
Click to collapse
I had some strange behavior like a busy signal when I had my phone set to 3G only, but I think it was because of marginal reception. I changed the frequencies to automatic and haven't had any problems since.

hawk971 said:
Hi all
I am wondering about the purchase of a Trinity. Someone, on an italian forum, has posted the problem of incoming calls lost (the caller receives a busy line signal or the phone results unreachable) while the phone has a data connection active (apparently only an HSDPA one). Has any one observed a similar problem ?
Thank you everyone.
Click to expand...
Click to collapse
Hello hawk971,
I have the exact same experience while being persistently connected on the Swedish HSDPA network (Hi3G) I cannot receive or even make calls, most of the time. It's like i can sometimes manage to "slip through" with a call, and even an incoming call can get through if i'm lucky. I have figured out that if i end the data connection and make the call, i can re-login with the connection and keep babbling on the phone.
The problem started to appear right after we moved to a different area where HSDPA is deployed, at first the problem was very sproadic, but now the network is growing, so does the blocked calls.
Luckily i get an sms from the 3 network saying that someone has tried to call without leaving a message, otherwise i'd be clueless.
I have considered contacting 3 operator to discuss this, but i reckon i might loose the HSDPA access then because i have only 3G subscription but somehow my phone (which is purchased without operator lock and not from 3) snaps right onto the HSDPA access nevertheless. I have a consistent 1Mbits/s DOWNLINK and 350kbits/s UPLINK connection while running TPTEST on the laptop and using the P3600 with internet sharing and USB-cable.
I so would like to be able to stay on the HSDPA but right now i am considering to drop the high-speed since the phone part is basically rendered useless. I am also using GpsGate in the car, so my internet is always on, transmitting position, i guess that makes the problem worse. I might have to drop that...
I had a friend told me he had the same problem with TyTn and Hi3G here in Gothenburg. That makes me think that there's no particular problem with my phone. Rather it's a network problem that they yet have to solve.
Anyway, that's a long post!
P.S. Does anyone know how i can disable/enable HSDPA on the P3600 easily?
Cheerio

just remove link to "enableHSDPA.exe" in \windows\startup folder and soft reset you phone.

I can't find this file (enableHSDPA.exe) anywhere in my P3600....

Bump!
SecureGSM can you please elaborate a bit on this .exe file. I have a standard HTC P3600 and I don't see this file anywhere in the file system.

i'd like to know how i enable HSDPA on my HTC P3600. has anyone had success doing so?

try the fit4cat regedit program

MontAlbert said:
try the fit4cat regedit program
Click to expand...
Click to collapse
I recently installed the fit4can or HTweakC as it is now called from here
http://wiki.xda-developers.com/index.php?pagename=Hermes_Registry. It allows you to turn off HSDPA and do other tweaks to your Trinity. No harm is done since you can turn the HSDPA back on again anytime. Since I upgraded to the new 1.38 Radio, I was picking up HSDPA all the time at home, and every time my phone was auto checking email I'd miss calls. This HSDPA "feature" needs a little work.

GPRS Issues

Hi
Ive had my Advantage for two days now, and i have missed 16 calls, even though the phone is on and has full signal, after playing around this afternoon it appears to be if there is a data connection active (GPRS) ie active sync live search maps, remote desktop calls get rejected.
Ive had an JasJar for the past year and never seemed to get the issue with that, and im using the same SIM / Network / Number i was before.
Does anyone have any ideas how to get the phone to pause the data connection so the phone can ring?
Does anyone else have the same issue?
Regards
Ben

myrapid said:
Hi
Ive had my Advantage for two days now, and i have missed 16 calls, even though the phone is on and has full signal, after playing around this afternoon it appears to be if there is a data connection active (GPRS) ie active sync live search maps, remote desktop calls get rejected.
Ive had an JasJar for the past year and never seemed to get the issue with that, and im using the same SIM / Network / Number i was before.
Does anyone have any ideas how to get the phone to pause the data connection so the phone can ring?
Does anyone else have the same issue?
Regards
Ben
Click to expand...
Click to collapse
you don't happens to be using Vodafone do you? If so i know exactly what is going on.....

Nope
No, i am on tmobile UK, what i don't get is that i works fine if i swap the sim back to my JasJar.
Ben

I miss calls all the time, about 70% of my calls fail for some reason or another.
T-Mobile Suck. I never had this much trouble with O2.
I have done experiments where somebody stood next to me calls me, and gets "the number you are calling is not available" while my phone, next to them is turned on with full battery and signal...
Even outgoing calls fail randomly, just says "calling" for ages then stops for no reason.

Ive had not trouble with tmobile since i have been with them (over 18 months) until i got the advantage, ive cloned every single setting i can from my jasjar and still no look, its a shame as looks like im going to have to disable push email!

myrapid said:
Ive had not trouble with tmobile since i have been with them (over 18 months) until i got the advantage, ive cloned every single setting i can from my jasjar and still no look, its a shame as looks like im going to have to disable push email!
Click to expand...
Click to collapse
that is strange, mine one now works perfectly, so when you miss your call, are you on 3.5G( HSDPA ) network or are you on GPRS?

wu5262 said:
that is strange, mine one now works perfectly, so when you miss your call, are you on 3.5G( HSDPA ) network or are you on GPRS?
Click to expand...
Click to collapse
Standard GPRS, it only happens when there is a contasnt data flow if it is just connected and the connection is not being used it calls in fine.
EG if i use remote desktop / terminal services over GPRS then call the advtange at the same time it goes to answer phone, although it does take around 10 seconds before it does though but doesn't ring, like it is looking for a signal/trying to connect.

myrapid said:
Standard GPRS, it only happens when there is a contasnt data flow if it is just connected and the connection is not being used it calls in fine.
EG if i use remote desktop / terminal services over GPRS then call the advtange at the same time it goes to answer phone, although it does take around 10 seconds before it does though but doesn't ring, like it is looking for a signal/trying to connect.
Click to expand...
Click to collapse
may i ask is there any reason why you are not using 3G? GPRS tend to have this problem, but 3G won't.

wu5262 said:
may i ask is there any reason why you are not using 3G? GPRS tend to have this problem, but 3G won't.
Click to expand...
Click to collapse
Coverage, my house and my office don't have 3G coverage, else i would be.

i was on o2 b4 n hardly ever had 3g signal n when i did my video calling never worked....since moving 2 t-mobile ive had no problem....my data connection is mon 9 till 6 b it 3.5g, 3g or gprs n i use cortado.com push email service for instant emails.....i still receive calls when connected
using the flext 50 with web n walk

I'm in the US using T-Mobile and GPRS and don't have this problem. I'll try to make it "break" and see if I experience the problem but just never noticed it.

If using GPRS and a call comes at the exact time you are receiving data, your call will go to voice mail or unanswered. Its the way the radio is designed...SOme carriers have been successful at ending the data stream and raising the priority of the voice. But GPRS modem in most phones only allows data or voice not both...but,
If using 3g/utms it should ring on the phone. And allow data and voice at the same time.
Maybe you universal is grabbing the 3g signal and for some reason the 7500 is using gprs.
Wu has also reported this problem with Vodaphone and Hsdpa...

eagle 1 said:
If using GPRS and a call comes at the exact time you are receiving data, your call will go to voice mail or unanswered. Its the way the radio is designed...SOme carriers have been successful at ending the data stream and raising the priority of the voice. But GPRS modem in most phones only allows data or voice not both...but,
If using 3g/utms it should ring on the phone. And allow data and voice at the same time.
Maybe you universal is grabbing the 3g signal and for some reason the 7500 is using gprs.
Wu has also reported this problem with Vodaphone and Hsdpa...
Click to expand...
Click to collapse
that is very correct, i have just change to T-Mobile yesterday, now my HSDPA works perfectly with voice, when voices comes in, it will switch the network to 3G and allow voices to comes in, data is still connected, just lower the bandwidth. Too bad that this doesn't work on Vodafone

Has anyone found a solution for this?
Regards,
Hollinshead

hollinshead said:
Has anyone found a solution for this?
Regards,
Hollinshead
Click to expand...
Click to collapse
there is no solution, the only thing you can do is swap your operator, or just don't use 3g at all....