Hello everybody!
I know this looks like it belongs in the networking forum, but I'd like an answer specific to the Jamin.
The problem is this:
If I am downloading a page with IE it blocks incoming calls. If the GPRS connection is active but no data is transferring calls go through.
I found an old thread on this and it seems to be a phone specific problem (some models do this and others don't).
So am I missing something?
Is this a ROM / hardware thing, or is there a setting some ware, or maybe this is dependent on the cellular provider?
Does anyone else here experience this? Please let me know and if my question is stupid don't hesitate to point it out.
P.S. I am using latest official i-mate ROM 2.13.9.23 WWE and 1_02.20.21 radio.
Sounds quite strange, if I remember well and from experience in low-coverage areas the GPRS signal is dropped first if calls are made on the handset and there is not enough bandwith for both. But I am sure we find a GSM network expert here that can enlighten us. Interesting question.
Hi,
I have aone xda Atom.
Have the same problem.
For example media player streaming internet radio , phone calls don´t came through. Or 1 in 10 came through.
If I´m connect without streaming or downloading then the call came through
Regards
Josef
As far as i remember you can't recieve any calls exactly when downloading. When GPRS is simply on it's ok. Don't really remember why...
As far as i remember you can't recieve any calls exactly when downloading. When GPRS is simply on it's ok. Don't really remember why...
The phone and GPRS are mutually exclusive.
We have a GPRS application that needs the connection to be alive as much as possible to receive incoming data. Phone calls get in the way of this, which is why I know the problem exists.
I do not have a validated reason for the problem (I believe they use the same transmission streams over the network, which means the network needs to know whether it is transmitting data or voice. Data needs to be reliable, with no dropped packets, while voice needs to be quick, with dropped packets being ignored, or something similar anyway).
Graham.
Hi,
Will like to add. Have one Universal too.
With the Universal if I ´m downloading or listen internet radio, when a call cames the downloading is suspend. Allways.
Regards
JoseF
Seems like it depends on service provider not on the device... I remembere the time when GPRS have just been started on NW Megafone - GPRS traffic lived like poor homie with the voice transmissions so when many peoples speaks - gprs is dead. Nowdays we got edge and gprs works fine. But still we got subj
Well, at least now I know it's not a matter of settings or ROM version.
Still not sure if it's the phone or the provider, but since I don't fell like switching either of them (specially the phone ) I guess I'll have to live with it.
Just to clarify: I don't expect simultaneous voice and data, but it would have been nice if incoming calls killed GPRS to get through even if I am in the middle of a download.
P.S.
Thanks every one for your prompt responses!
Not much help, but this is among the reasons I use a multicard - maybe you want to consider it. A multicard is two SIM cards with the same number, but one card is activated for GPRS/UMTS and SMS, and the other one for voice traffic and SMS. Especially with a flat data rate, GPRS is always on, and one does not have to use the Prophet as a phone all day. It means you have to carry two phones, but for a heavy user working with these tools all day it makes perfect sense. Just my five cents...
Just to clarify: I don't expect simultaneous voice and data, but it would have been nice if incoming calls killed GPRS to get through even if I am in the middle of a download.
Click to expand...
Click to collapse
Hm... Let me think... I remember there was such a nice setting on my Panasonic GD87, called "Wait for incoming call" or smt like this. Nice feature. Gives the ability of cellular phone disconnect from gprs and recive incoming call. Seems like I'll be missing it
Are there any news on this?
I have the same problem, that incoming calls are blocked when using GPRS.
Hi yoda_143.
I recently got to do some testing at work with phones from different manufacturers (MIO, HP, ASUS) and my SIM.
The conclusion: It is not the Jamin!
On all phones incoming call was blocked while data was transferred.
I haven't had the chance to test it with different providers, but I suspect this will not make a difference.
It would be nice though if there was a way to give voice calls priority even if it meant starting the download over from the beginning after the call ends.
Guys this might help
http://www.gsmworld.com/technology/gprs/class.shtml
Class A, Class B & Class C?
The class indicates the mobile phone capabilities.
Class A
Class A mobile phones can be connected to both GPRS and GSM services simultaneously.
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.
Class C
Class C mobile phones are attached to either GPRS or GSM voice service. You need to switch manually between services.
BUT; even my Wizard claims that it's Class B, does the same thing and blocks incoming calls while downloading. So what does it mean?? Maybe a network provider issue :?:
From my use of XDA2i it appeared that phone can transfer GPRS data or phone call not both at the same time.
If you want both then you will need 3G/UMST
The Universal will happily allow phone calls whilst surfing over a 3G connection. Even on Universal you lose the ability for data&phone if you are using GPRS.
I see but it says everywhere that Class B phones has to stop data transfer and accept incoming calls. My old Sonyericsson T630 was doing the job! BTW my network provider claims in their website FAQ like this..
Q- During download with GPRS, if an incoming call occurs, do my GPRS connection stops?
A- During download with GPRS, if an incoming call occurs, you can easily accept the call. During call, your data transfer suspends and after call ends, goes on where it was suspended.
EDIT: I talked with network operator today and they changed their web site saying after a few tests that "u can't suspend and resume GPRS data flow, while data flow incoming calls are blocked!!"
While Wizard is Class B and the operator uses NOMII , all architectural must be wrong.
Really WEIRD, isn't it?
This article is also interesting (don't look "symbian" thing, it is a general article about GPRS/NOM)
http://www.symbian.com/symbianos/standards/symbianongprs.html
Network operation mode and phone classes
The Network Operation Mode, or NOM, is responsible for the capabilities of a GPRS network, while the class indicates the mobile phone capabilities. On NOM 1 networks, mobile phones with the right capabilities can have simultaneous circuit- and packet-switched connections. On NOM 2 networks, mobile phones can remain attached to the GPRS networks when in a voice call but they can't transmit data at the same time. On NOM 3 networks, mobile phones can either establish a packet-switched data connection or a circuit-switched voice one but they need to disconnect from one to establish another.
Class A phones can make full use of NOM 1 networks: they can use circuit-switched voice and GPRS data services at the same time. Class B phones can register circuit-switched voice and packet-switched data services at the same time but may only use one at a time. Should the user receive a call while on the internet, they can take the call and GPRS service will be suspended, resuming once the voice call is ended. Resuming GPRS service is much faster than re-establishing a data call. Class C phones can only register for packet-switched data or for circuit-switched voice services; if the user chooses GPRS, then they will be totally unavailable for GSM calls and reciprocally.
End-users will initially have access to Class B mobile phones, which are able to make and receive calls while simultaneously being registered with GPRS services - GPRS services will automatically be suspended and resumed at the end of the call. Class B phones only support one active service at a time - GSM (voice, fax or data) or GPRS (data) - though both services can be registered with the network and the phone can switch automatically back and forth. However, should the user roam to a network area that is NOM III, their Class B phone will effectively be working as a Class C phone.
New applications designed to run in an online environment will be developed to take advantage of GPRS and 3G networks. The user may well experience a 'blurring' of applications whereby they won't need to switch task nearly at all.
my universal (t-mobile) on 3g in australia is quite fine i tested the situation you guys are talking about and itl mmove he program to background and take the call (both do run simultaniously (internet might slow down alittle by about 3 Kb/s so hope this helps someone... byebye (GREAAT WEBSITE!)
Related
I just switch to 3G instead of 2G. I want to experience the high speed internet suffing via my handset.
But I found the problem is that the phone call can't came in if I using the 3G data. Not even transfer to security services. Just a "Busy tone".
Check with the service provider and they are now checking with their technical dept to see if they can found the problem.
They said that the call should be able to come in because the phone call channel is different to the data channel. :roll: :?:
Anyone experience the same problem?
I experienced the same problem with my CHT9000. You may change the setting to GSM then call can come in when you using GPRS but you can't enjoy the high 3G speed on data transmittion. Anyone has better solution?
complicated issue; can be the same with GPRS/EDGE ; I made a lot of research read below;
http://forum.xda-developers.com/viewtopic.php?t=54738&highlight=
It is interesting. I don't have this kind of problem while I am using GPRS. But it happen to my new network provider (3G).
Lucky you then :lol:
At least you have GPRS/EDGE working and as a result it is absolutely a network provider issue.
I talked every detail with a guy in my Net. Op. and seems can be solved by "tricky switching something on" but they could not make me believe that this is not thier mistake. Because Class B phones MUST suspend the data flow and accept incoming calls for the technical point, only class A phones (no retail ATM) can make data flow and GSM talk at the same same.
GPRS is 2G, EDGE is 2,5G and same tecnique as 3G, only speeds are lower, so I beleive if u use 2G suspend while incoming calls your Net.Op. can solve the problem if they want :wink:
I have this strange problem with my vario II.
I am using Tmobile GPRS on both 2g and 3g network, If I am using the 2g phone works if If am using 3g phone doesn't work if I call it, the phone rings but doesn't alert me. The most annoying problem I am having is the phone switches between 2G and 3G if I am in a call the phone goes silent can't hear anything the display shows the call as connected and around 5-10 seconds later the phone drops call drops. This happens even if the data connection if not active.
What is the deal with that? anyone else have this problem.
Phone band settings are below
network type
Auto
GSM
GSM(900+1800)+UTMS(2100)
I've just discovered the same problem with my orange branded tytn, I'll be phoning them later to ask what they can do about it.
xxnoelziexx said:
I am using Tmobile GPRS on both 2g and 3g network, If I am using the 2g phone works if If am using 3g phone doesn't work if I call it, the phone rings but doesn't alert me.
Click to expand...
Click to collapse
Works perfectly on T-Mobile UMTS for me. I did flash the Dopod 838Pro ROM though.
will flash the dopod rom in the morning. I am currently using the imate rom, and the tmobile rom the device shipped with had to many slow downs so it had to go. if this fixes the drop out issue I will be happy if not the phone will be in its box till a rom update. got the phone cheap so don't really mind. nice phone/pda apart from this issue in my line of work can't afford to miss or drop calls.
so is this a hardware or a software issue then?
No harware problem, it is absolutely software issue. Read my posts above and the links I gave
No problems here I'm afraid.
Voda v1605 running the Voda Blackberry Client, so either 3G or GPRS (where no 3G available) on all the time. Calls and SMS received perfectly.
Only issue I have is when using 3G, unlike home wired broadband, I cannot use multiple applications through the single 3G connection (e.g. Blackberry client on and surf too)
Steven
I've got a T-mobile UK touch plus.
Currently, if I am using the data connection then all incoming voice calls are being sent to voicemail. This occurs with a GSM connection, which is part of the spec and is fine, but also with the 3G connection, which should allow the incoming voice call through. I have spoken to t-mobile and they acknowledge this problem and say they are working to fix it.
Is it likely there will be a fix for this? Is there a radio ROM already available that fixes the issue?
Sorry if this has already been covered - I searched with a pretty wide variety of terms and didn't find anything conclusive.
I have the same phone, same network... and it still rings while i have the "3g connected" symbol (3g with two arrows pointing left and right) showing.
Havent tried while connected to GPRS cuz im not sure how to force it into G mode while im near a phone.
Sorry, I should have been clearer - the phone will ring with an unused 3G connection, but not when data is actually being sent/received. This is the behaviour you would expect from GSM, but the 3G spec should allow voice calls through regardless of data - my Vodafone v1605 has no problem with this. T-mobile say it is the device not the network, I just wonder how likely I am to get a fix for this? It could be a problem with activesync using the data connection quite frequently.
A good way to test it is with google maps, or something that will maintain a constant connection, then call your phone. 3G should put the call through, but it will be rejected to voicemail instead.
FYI to put into GSM mode;
Settings>Phone>Band>Set top option to GSM, leave bottom on Auto
same problem here. but i only expreienced that randomly
i know that gprs can not handle data and voice. but 3g should, right?
Yes, 3G should be able to run voice and data streams simultaneously without any problems. I'm surprised there is not more interest in this because it seems to be a pretty major problem with the device if you cannot receive calls while browsing or otherwise using the data connection.
Me too
I experienced this too. I have an direct HTC Touch dual rather than the t-mobile branded version but I'm using a t-mobile sim. I use Exchange Activesync and am missing calls all the time.
fwiw, i experience the same with a Nokia e61 on 3-AT network with exchange active.
It seems that T-mobile have fixed their network today to allow calls while using data. Bonus.
Hey guys, I am not sure if I am missing something in the settings or what, but for some reason, when i am talking on the phone I cannot connect to the internet. My HSDPA connection turns off. Once I hang up, it reconnects. I thought the X1 was capable of doing simultaneous voice and data connects. What causes this? And is there a way to enable both voice and data connects at the same time? Thanks!
boy I explain this a lot
simultaneous voice and data have been available since the first gprs phone
it was the reason gprs was invented rather then dialup data over gsm
but if the operators hardware in the centrals don't support it no phone or setting
can change that
i'be been doing in on my old himalaya gprs phone for ages
and now on my x1 never had any problems
Well, I can do it on my old 3G phone, but not on my X1a. AT&T has allowed this for years, I know that. I just want to know if there is a way I might have accidentally turned it off or something.
Mine won't do it either. My Xperia kicks on the Wifi and continues PUSH email delivery through when ever I have the phone in use. BUT, my blackberry and iPhone would both not allow voice and data at once. It may have to do with T-mobile's settings where I am though.
I have the same issue with T-MO network.
you mean like talking on the phone and continuing surfing the net?
leobox1 said:
you mean like talking on the phone and continuing surfing the net?
Click to expand...
Click to collapse
Exactly. My internet gets "put on hold" for the duration of the phone call.
I face this when i have a GPRS/EDGE coverage, but when connected to 3G/3.5G/H it's ok, i can make both without problems
anaadoul said:
I face this when i have a GPRS/EDGE coverage, but when connected to 3G/3.5G/H it's ok, i can make both without problems
Click to expand...
Click to collapse
I would like to expand this...
anaadoul is correct. In fact, regular GPRS cannot send data simultaneously as the voice call.
EDGE can SOMETIMES do so if the carrier's tower/cell supports this, but not all do, so while EDGE provides faster data connection, you may or may NOT get simultaneous data and voice. This is my experience at least. I think EDGE is always supposed to support simultaneous voice/data but my experience shows otherwise.
This is one of the primary reasons I am using a 3G network and 3G phone now. 3.5G/H while providing faster data, have no difference in regards to simultaneous voice data, but do use more power/battery so if I know I'm going to be out a long, long time, I turn H/3.5G off.
For me, it is VERY important I can use data and voice at the same time. I have my phone checking mail every 10 minutes, and it takes about 10-30 seconds to successfully check mail, so that means every 10 minutes, if an incoming call arrives, it'll go straight to voicemail and I miss it. That is not acceptable.
Plus, if I receive a business call, I can check mail, open up websites, etc. WHILE i am on the call. You have no idea how useful that is.
johnchan78 said:
I would like to expand this...
anaadoul is correct. In fact, regular GPRS cannot send data simultaneously as the voice call.
EDGE can SOMETIMES do so if the carrier's tower/cell supports this, but not all do, so while EDGE provides faster data connection, you may or may NOT get simultaneous data and voice. This is my experience at least. I think EDGE is always supposed to support simultaneous voice/data but my experience shows otherwise.
This is one of the primary reasons I am using a 3G network and 3G phone now. 3.5G/H while providing faster data, have no difference in regards to simultaneous voice data, but do use more power/battery so if I know I'm going to be out a long, long time, I turn H/3.5G off.
For me, it is VERY important I can use data and voice at the same time. I have my phone checking mail every 10 minutes, and it takes about 10-30 seconds to successfully check mail, so that means every 10 minutes, if an incoming call arrives, it'll go straight to voicemail and I miss it. That is not acceptable.
Plus, if I receive a business call, I can check mail, open up websites, etc. WHILE i am on the call. You have no idea how useful that is.
Click to expand...
Click to collapse
allow me to agree/disagree with you on some points.
imo, Edge doesn't support simultaneous call/data, except some devices that have some dual GSM radio as both operate on the same radio device level.
afaik the technology of 3G+ is different, the voice itself is not being transmitted as GSM signal, it's converted into a something similar to VOIP (that what makes Video Call Happens), a phone call uses one channel for audio transmit, the good thing is that the archetecture of 3G+ is designed to have multiple simultaneous connections to the tower cell, this will allow more transfer bandwidth, while this makes you able to browse and talk at the same time, it also puts more load on the cell (the cell can accept a certain fixed number of connections depending on the location and population of the area) resulting on people getting Network Busy Error!
so the result is a data connection is dropped if the cell is full in order to take a phone call.
what makes 3G+ really fast is that it can open milti channels with the cell, allowing more allocated bandwidth (we all know it reaches up to 7.2mbps).
3G+ consumes LESS power imo than GPRS/EDGE (Data connection only, voice calls consumes more on 3G+) as 3G+ will close all active connections when there is no application transferring (see the H icon disappearing when no application is downloading anything and 3G/3.5G icon is there, once an internet request is made it will go back to H).
so the result i think as follows
GPRS/EDGE : Low battery consumption for voice calls, High for Data & No simultaneous Call & Data.
3G/3.5G/HSDPA : Higher battery consumption for voice calls, Low for Data & Supports simultaneous Call & Data.
btw, i am connected to my Company's exchange server using Microsoft Direct Push. when the connection is G or E, i loose my battery more quicker than 3G/3.5G/H
even i have noticed that 3G+ consumes way less power that WiFi (now my email is synced over the air even in the office so my battery won't die quickly. don't worry i have a huge data plan )
please correct me if i'm wrong, all my information above is based on personal experiance
cheers
Well, I don't know if this will work for everyone but I fixed my issue. I just called my voicemail and put it on speakerphone in order to keep the voice connection open. Then I tried surfing with Opera a few times. The first few times it wouldn't connect, but then suddenly my phone beeped twice and I got the connection window saying my 3G was connecting. At first I thought I had just forced it but in retrospect, I think I just had a bad signal and had just connected to my 3G network. Thanks for all the info guys!
k20z3_si said:
suddenly my phone beeped twice and I got the connection window saying my 3G was connecting.
Click to expand...
Click to collapse
Call dropped maybe?!
try this,
Start -> Settings -> Phone -> Band
1.Set network type to WCDMA
2.Set GSM/UMTS band to UMTS
these forces your device into a 3G+ network
3.open commManager from start menu
4.turn dataconnection ON
5.Make a call
6.try browsing
7.Post Here
cheers
anaadoul said:
allow me to agree/disagree with you on some points.
imo, Edge doesn't support simultaneous call/data, except some devices that have some dual GSM radio as both operate on the same radio device level.
afaik the technology of 3G+ is different, the voice itself is not being transmitted as GSM signal, it's converted into a something similar to VOIP (that what makes Video Call Happens), a phone call uses one channel for audio transmit, the good thing is that the archetecture of 3G+ is designed to have multiple simultaneous connections to the tower cell, this will allow more transfer bandwidth, while this makes you able to browse and talk at the same time, it also puts more load on the cell (the cell can accept a certain fixed number of connections depending on the location and population of the area) resulting on people getting Network Busy Error!
so the result is a data connection is dropped if the cell is full in order to take a phone call.
what makes 3G+ really fast is that it can open milti channels with the cell, allowing more allocated bandwidth (we all know it reaches up to 7.2mbps).
3G+ consumes LESS power imo than GPRS/EDGE (Data connection only, voice calls consumes more on 3G+) as 3G+ will close all active connections when there is no application transferring (see the H icon disappearing when no application is downloading anything and 3G/3.5G icon is there, once an internet request is made it will go back to H).
so the result i think as follows
GPRS/EDGE : Low battery consumption for voice calls, High for Data & No simultaneous Call & Data.
3G/3.5G/HSDPA : Higher battery consumption for voice calls, Low for Data & Supports simultaneous Call & Data.
btw, i am connected to my Company's exchange server using Microsoft Direct Push. when the connection is G or E, i loose my battery more quicker than 3G/3.5G/H
even i have noticed that 3G+ consumes way less power that WiFi (now my email is synced over the air even in the office so my battery won't die quickly. don't worry i have a huge data plan )
please correct me if i'm wrong, all my information above is based on personal experiance
cheers
Click to expand...
Click to collapse
I agree... 3G and 3G+ seem to consume LESS battery than WIFI!
As for Edge, my experience is that I never could get simultaneous voice/data, but you're right, both the cell AND the phone need to support this function. I dont think our Xperia's hardware actually supports this at all. When I switched to using the Xperia I had purposely changed to a 3G network to take advantage of the 3G/3G+ capabilities it has.
i am quite sure that GPRS does not support simultaneous... everytime i call, a "cancel" icon appeared
I called AT&T to see if they support simultaneous Data and Voice and they said they do, but your phone has to as well. The X1 supports it also, so I just think I wasn't asble to do so because I was only in GPRS, not 3G.
leobox1 said:
i am quite sure that GPRS does not support simultaneous... everytime i call, a "cancel" icon appeared
Click to expand...
Click to collapse
It doesn't. We already stated that above. anaadoul and me already stated that above.
I read in one of the threads (can't remember where) that someone mentioned you can't receive a call if you are 'ACTIVELY' web browsing over a 'G' signal. I've tested this today and found it to be true as that is the signal I have in this office. If you come out of Opera (with it still in the background) it will connect but when you go back in and open a new link you again will not be able to recieve calls.
Anyone Know the reasons behind this, bit of a pain if you ask me.
its the nature of GPRS i am afraid... its the same on any mobile if you are actively browing using GPRS.
GPRs is only capable of making one connection at a time.
You dont get this issue if you are say browsing with 3G or HSPA.
question
Hi, I have a question regarding this. If you use GPRs and enable push email, automatic frequent weather update, twitter update etc, does that mean you won't have much chance to receive any phone calls/text messages?
luffyp said:
Hi, I have a question regarding this. If you use GPRs and enable push email, automatic frequent weather update, twitter update etc, does that mean you won't have much chance to receive any phone calls/text messages?
Click to expand...
Click to collapse
was just thinking about that myself... im not 100% sure as it would depend upon the amount of time your GPRS data connection is active.
As a matter of fact, GPRS as a standard is perfectly capable of handling simultaneous voice and data calls. There are different classes of GPRS devices varying from doing only one thing at a time to simultaneous voice and data. Most phones, including HD2, are, IIRC, Class B devices, meaning that they will pause data transfer during voice calls. Whether this will actually work or not, however, depends on your network - your operator may not provide enough slots for this. If this is the case, you will lose incoming calls occasionally during active data transfer, and there's nothing you can do about it apart from not using data or switching to another provider.
vangrieg said:
As a matter of fact, GPRS as a standard is perfectly capable of handling simultaneous voice and data calls. There are different classes of GPRS devices varying from doing only one thing at a time to simultaneous voice and data. Most phones, including HD2, are, IIRC, Class B devices, meaning that they will pause data transfer during voice calls. Whether this will actually work or not, however, depends on your network - your operator may not provide enough slots for this. If this is the case, you will lose incoming calls occasionally during active data transfer, and there's nothing you can do about it apart from not using data or switching to another provider.
Click to expand...
Click to collapse
Thanks, i can confirm that it does not work with o2 tried and tested
With 3G connected and while in a phone call I can't update the weather during the phonecall. Vodafone.
Hello,
the HTC support tells me, that you can´t surf (with and without tethering) and make a phone call at the same time.
Is there a hack or patch to do this at the same time?
P.s. Somewhere i saw, that iPhone can do this with a hack.
You can do it if you're on 3G or WiFi.
If you're on GSM you can't do it.
That sounds great!
But when im on gsm in internet, does i still get incoming calls?
That is very importent for my business...
No, only on 3G. GSM supports only call or data, not both at the same time. If data is connected but not actively transferring stuff, incoming calls will go through, but if you're downloading at that moment the call will just sound busy/go to voicemail. That's a network limitation.
kilrah said:
No, only on 3G. GSM supports only call or data, not both at the same time. If data is connected but not actively transferring stuff, incoming calls will go through, but if you're downloading at that moment the call will just sound busy/go to voicemail. That's a network limitation.
Click to expand...
Click to collapse
Actually it is not a network limitation.
There are Class A devices out there that can handle simoultaineous voice and data sessions.
GSM is not a network connection like GPRS and other. GSM is like old 56k modem which dials up a number and holds the line. Therefore, you cannot connect to GSM and make a call. This is a network limitation, not related to phone (unless you have 2 sims).
GPRS, EDGE are extensions of GSM... and today's general use of "GSM" includes those... GSM = not 3G