Develop Bugs

Query: Simultaneous GPRS data transfer & Voice call

I have an MDA C3. When web & walk is transferring internet Data and a call comes in, the phone does not ring. It goes directly to the voicemail.
T-Mobile customer service tell me that this is correct as you can either transfer internet data or make a call.
Is that right? I thought that was with WAP which is analagous to dial-up. Surely GPRS is analagous to Broadband.
Anyone else want to try this:
Go to Web & walk home page. Attempt loading up the guardian page (This will take a while). Whilst this is loading, call your phone number and see if it rings or goes direct to VM.
I spend lots of time browsing so I must be losing lots of calls!
Feedback greatly appreciated.

From what I have heard only UMTS devices can support simultaneous voice/data.

Yes - but not GRPS that uses GSM band instead of UMTS.
However, some devices have troubles keeping the data link active when a call comes in.

I am having the same issue (also on T-Mobile UK).
Then IE is running or AS is downloading my mail (I use direct push) all my calls go straight to voicemail.
This is worrying as I just moved over to T-Mobile for the web n walk package to allow me to have instant e-mails. This is a pain if it means I miss calls whilst my mail is downloading.
You'd think that the chances of the 2 coinciding are slim (I don't get a lot of mail, maybe 10 per day) but the wife has already complained 3 times since Friday that she went straight to voicemail, and each time it was exactly as i got a new mail.
Is this a limit of GPRS, the Orbit or just T-Mobile?
Thanks
Dae

I was surprised too... Thats why I posted the query. I thought my phone and/or SIm were faulty. But T-Mobile tell me thats how its supposed to work.
With W&W and Email, Its really hard for someone to get through with a voice call. It was worrying for me as I tend to browse the net whenever I am waiting around. This means that when I am on the bus surfing, no one can get through to me!!
Surely if there is a limitation, then the phone should give precendence to the Voice call. After all, you can pick up your emails or surfing where you left off.
I would really be interested to see if this is a T-Mobile only problem.

No itschase is spot on.
It's not a t-Mobile problem, it's the same for any GSM based network.
Only 3g (UMTS) phones can do data and voice at the same time. No matter what network you are on.

I have just run an experiment in the office as follows:-
Me (artemis with v3 black and blue) - Voicemail when data active
person 1 (MDA compact III - v3 black and blue) - Voicemail when active
person 2 (hermes) - no Voicemail when active.
We are all on t-mobile UK, and therefore it doesn't look like a network issue, but maybe a ROM problem?

daesimps said:
therefore it doesn't look like a network issue, but maybe a ROM problem?
Click to expand...
Click to collapse
What problem? Everything is working as it supposed to. If it's so important to you. Go buy a 3g phone!

I now fully appreciate that 3g phones are the only ones to support this type of behaviour.
I was trying to be helpful and post the results of my test as at that point I didn't realise that only 3g phones worked as such. I was lead to believe this by wikipedia:-
"Class B
Can be connected to GPRS service and GSM service (voice, SMS), but using only one or the other at a given time. During GSM service (voice call or SMS), GPRS service is suspended, and then resumed automatically after the GSM service (voice call or SMS) has concluded. Most GPRS mobile devices are Class B. "
Obviously this is not the case.
Bring on the HTC Kaiser!!!

Gajet said:
What problem? Everything is working as it supposed to. If it's so important to you. Go buy a 3g phone!
Click to expand...
Click to collapse
I incorrectly assumed that whilst browsing, if a voice call comes in, the phone would give priority to the call.
If I had known what I know now at the time I signed my 18M contract I would have bought a 3g Phone! Its just annoying that i'm stuck with it for another 12M. T-Mobile push the fact that they have set the internet free... but what they fail to get across to everyday users is that its "AT THE EXPENSE OF THE VOICE CALLS"

Because T-Mobile forced you to buy one of their 2.5g phones rather than one of their 3g phones?

I have no problem receiving phone calls while browsing the internet on the P3300.

cduijker said:
I have no problem receiving phone calls while browsing the internet on the P3300.
Click to expand...
Click to collapse
Neither have I to be honest, the issue only arises while you are actively downloading data. However once the website has loaded, you are free to accept calls again whilst still looking at the site in the browser.

Gajet said:
Neither have I to be honest, the issue only arises while you are actively downloading data. However once the website has loaded, you are free to accept calls again whilst still looking at the site in the browser.
Click to expand...
Click to collapse
As a test I started downloading a dummy 32MB testfile on my P3300 (from speedtest.bbned.nl) and I called my mobile with another phone.
There was no problem; I received the call while downloading the file.
Maybe it depends on the operator? I am in Holland on T-Mobile

daesimps said:
I now fully appreciate that 3g phones are the only ones to support this type of behaviour.
I was trying to be helpful and post the results of my test as at that point I didn't realise that only 3g phones worked as such. I was lead to believe this by wikipedia:-
"Class B
Can be connected to GPRS service and GSM service (voice, SMS), but using only one or the other at a given time. During GSM service (voice call or SMS), GPRS service is suspended, and then resumed automatically after the GSM service (voice call or SMS) has concluded. Most GPRS mobile devices are Class B. "
Obviously this is not the case.
Bring on the HTC Kaiser!!!
Click to expand...
Click to collapse
Hi,
It's not enough to have a class A (2G) device, but also DTM (Dual Transfer Mode/Simple Class A) support has to be active in the specific network, otherwise only 3G device on 3G network will provide Class A (simultaneous voice & data).
In fact, there are quite many models from Nokia during last year that support DTM, but as already mentioned, it's not enough.
FYI,
Zohar

cduijker said:
As a test I started downloading a dummy 32MB testfile on my P3300 (from speedtest.bbned.nl) and I called my mobile with another phone.
There was no problem; I received the call while downloading the file.
Maybe it depends on the operator? I am in Holland on T-Mobile
Click to expand...
Click to collapse
Is that an EDGE network ?

I got the Artemis with PV Black&Blue v3 ROM.
I can receive calls while pages are loading in IE.
I think this is a provider problem.
The phone provider has to intercept your GPRS connection and establish the GSM connection. Maybe T-Mobile just rejects calls while a GPRS connection/transfer is active.
A1 intercepts the page download and my call comes in.
When I pick up, the GPRS connection is closed completely. (not just pending)
So receiving calls while surfing is no problem for me with Austrian A1 provider.
Any other experiences?

Gajet said:
Is that an EDGE network ?
Click to expand...
Click to collapse
no, just gprs; no edge.

cduijker said:
no, just gprs; no edge.
Click to expand...
Click to collapse
...then it's no way you'll get simultaneous voice and data (class a).

6.20.502.5 ATT Firmware

Hi All,
Has anyone extracted the the firmware from the RUU? I did a quick search and just saw one with the HBOOT. Also has anyone installed the HTC RUU? Is it any good?
Thanks in advance.

Here
http://forum.xda-developers.com/showpost.php?p=66871005&postcount=13

Of course wnc and ckpv5 would be involved!
Guess I should have looked a little harder than searching by the numbers!
Many thanks!
Sent from my SAMSUNG-SGH-I747 using XDA-Developers mobile app

If anyone is looking for an already modified version of the 6.20.502.5 firmware. I removed the boot.img and the recovery.img file and replaced the hboot file with one that has no red text. This firmware works fine on the AT&T and Developer's Edition models.
Download here.

Hey everyone in this post,
Please check to make sure that you are receiving voice calls. I just discovered that I can make outgoing calls just fine however ALL incoming calls are going directly to voicemail. I'm going to do a little more research but it looks as though I'll need to revert to an earlier firmware. I'm guessing this has something to do with HD Voice.
A couple more things of note: I'm on the latest version of ARHD which is 53.1 (MM); texts work fine both ways; data is fine; voicemail functions fine. Just to give a little background.

ccw1134 said:
Hey everyone in this post,
Please check to make sure that you are receiving voice calls. I just discovered that I can make outgoing calls just fine however ALL incoming calls are going directly to voicemail. I'm going to do a little more research but it looks as though I'll need to revert to an earlier firmware. I'm guessing this has something to do with HD Voice.
A couple more things of note: I'm on the latest version of ARHD which is 53.1 (MM); texts work fine both ways; data is fine; voicemail functions fine. Just to give a little background.
Click to expand...
Click to collapse
I'm having the same problem. I fiddled with the APN settings and it seemed (I'll try again) to fix that issue. Meaning I manually entered the APN settings and I was able to receive calls. A bit ridiculous.
Edit: It's not the APN Settings that helped. It's actually switching the preferred network from LTE to 3G or maybe even 2G. Haven't checked it on 2G.

garekinokami said:
I'm having the same problem. I fiddled with the APN settings and it seemed (I'll try again) to fix that issue. Meaning I manually entered the APN settings and I was able to receive calls. A bit ridiculous.
Edit: It's not the APN Settings that helped. It's actually switching the preferred network from LTE to 3G or maybe even 2G. Haven't checked it on 2G.
Click to expand...
Click to collapse
I finally got mine working but I have no idea what the magical combination ended up being. I did downgrade to a previous 6.12 firmware but that alone didn't do the trick. I also manually added a new APN in addition to many other things one by one. I was actually on an outgoing call and my line beeped because I had a call waiting! I was so shocked (and pleased) that I hung on the person I was speaking with and answered the call. From then on it has worked fine. Having said that I'm going to sit tight with the phone the way it is until someone much smarter than me lays out a solid plan.
I'm glad you got beyond your problem as well :good:

ccw1134 said:
I finally got mine working but I have no idea what the magical combination ended up being. I did downgrade to a previous 6.12 firmware but that alone didn't do the trick. I also manually added a new APN in addition to many other things one by one. I was actually on an outgoing call and my line beeped because I had a call waiting! I was so shocked (and pleased) that I hung on the person I was speaking with and answered the call. From then on it has worked fine. Having said that I'm going to sit tight with the phone the way it is until someone much smarter than me lays out a solid plan.
I'm glad you got beyond your problem as well :good:
Click to expand...
Click to collapse
Are you still able to receive phone calls while on 4G? Any further issues? I asked because ever since upgrading to LP firmware I no longer can receive incoming phone calls while on 4G but I can make calls. I have noticed that while on a call on 4G I can receive calls which is strange. So I have to stay on 3G to receive all incoming calls. Any ideas on a fix? Thanks
Sent from my HTC One_M8 using Tapatalk

makaveli0622 said:
Are you still able to receive phone calls while on 4G? Any further issues? I asked because ever since upgrading to LP firmware I no longer can receive incoming phone calls while on 4G but I can make calls. I have noticed that while on a call on 4G I can receive calls which is strange. So I have to stay on 3G to receive all incoming calls. Any ideas on a fix? Thanks
Sent from my HTC One_M8 using Tapatalk
Click to expand...
Click to collapse
Your situation does sound similar to mine. Whatever combination of zany things that happened for me as forced my network into HSPA+ whereas it used to read LTE. I'm not referring to the icon in the status bar (that still reads 4G). If I go into Settings>About>Network>Cellular network type. That's where I see HSPA+, HSPA or HSPAP depending on where I am. My speeds are WAY slower but it's still functional, yet there's something obviously still broken. Since I can receive calls now I've decided to just "live with it" until I come across a proper solution that I know will work. If that day should ever come though, I'll be sure to post back here.
Update:
I am back to my "Cellular network type" displaying "LTE" and my download speeds also confirm this. Below are the additional steps I took to get to this point:
1. In the phone dialer enter *#*#4636#*#* (takes you to a "Phone info" screen)
2. Scroll down to "Set preferred network type" (take note of its current selection in case you need to go back)
3. Using the dropdown, select GSM/WCDMA/LTE auto
That's it. After a few seconds my data icon refreshed and I knew I was good to go. For good measure I went back to Settings>About>Network to verify my Cellular network type. Good luck.

ccw1134 said:
Hey everyone in this post,
Please check to make sure that you are receiving voice calls. I just discovered that I can make outgoing calls just fine however ALL incoming calls are going directly to voicemail. I'm going to do a little more research but it looks as though I'll need to revert to an earlier firmware. I'm guessing this has something to do with HD Voice.
A couple more things of note: I'm on the latest version of ARHD which is 53.1 (MM); texts work fine both ways; data is fine; voicemail functions fine. Just to give a little background.
Click to expand...
Click to collapse
AT&T's deployment of Voice over LTE (which they've branded "HD Voice") does not play well with international-based custom ROMs (basically, most any ROM that is not ATT based). Issues with voice calls is the common symptom.
Best workaround is to call AT&T and ask them to turn off HD Voice for your account (may need to ask for 2nd Tier tech support before you get someone who knows what you are talking about). Yes, you can turn off LTE, but that is obviously not a great option.
Other fixes (APN, firmware) are likely placebo effect at best. Went down a similar path trying to troubleshoot this problem for folks a year ago, before coming to the conclusion (Post #9): http://forum.xda-developers.com/att-htc-one-m8/help/incoming-calls-lte-mode-m8-att-arhd-34-0-t3026710

At&t on a3000 issue

I've been having issues with calling, such as when I go to call someone, sometimes they can't hear me, but I can hear them, and other times, I can't hear them but they can hear me. I notice I switch from lte or lte+ to h or h+, mostly h+. Could that be the problem? Could it be not selecting the right wcdma or umts band? Im at a loss to solve this problem. I've tried changing and modifying apns and preferred bands, in the hidden menu and in the sim card menu. I've also tried both stock and custom roms. Anyone else have this issue? I'm currently using rr remix nougat rom.
EDIT: I found out something interesting. I tried throwing my phone in 3g and making a call and it worked with no problem, surprisingly it didn't freeze the phone dialer. Will do more tests.
EDIT 2: OK, after attempt after attempt, I completely wiped the phone, like formatted EVERYTHING, multiple times/changed file systems back and fourth, then adb side loaded oxygen os with stock recovery. And after the phone booted, I noticed a sound issue, but I flashed a stock audio zip. Then.... Walla no issues, radio is more smooth, calls now work when received or made, the switch from lte or lte+ to h or h+ is now smooth asf. I will post again if to have problems.

i experience the same thing, it changing to h+ is normal b/c att does not have LTE over voice, so it will automatically goto h+ when making a call. It could be a number of things, it could be ur coverage location or it could just be a bug in the phone or just att, I work at att so i know its not perfect, i always seemed to have more issues with custom roms though

I haven't noticed it being better or worse on stock or custom roms, thanks for your imput though.

Something to try would be to get a prepaid sim from another carrier and drop it into sim 2. Do some test calls from the alt carrier and see if the same problem exists. If it does then it's possibly a hardware issue. If the issue seems to to clear up on the alt carrier then it's possibly AT&T.

I've heard others say its at&t, and even the store people said its a known issue with the one plus 3 and other unlocked phones

M8 does not receive calls on 4G, works when I switch it to 3G.

I have a HTC One M8, AT&T, TWRP recovery, flashed and rooted with ICE 8.2.2; SuperSu.
When I am connected to 4G/LTE and someone calls me, it rings on their end but my phone does nothing. I checked my IMEI and see LTE is supported. When I switch my mobile network from 2G/3G/4G (auto) to 2G/3G (auto), it connects (H, H+ icon) and my phone receives incoming phone calls. My SIM card does not mention "4G" or "LTE". I have yet to try the SIM in another phone yet but plan to tonight.
Just to help me out with my thought process on figuring out the issue I'm going to think out loud for a second:
Put my SIM in another phone and make sure 4G/LTE is on, check if it receives calls. If it works, the issue is my phone or ROM. If it doesn't work, SIM card is the issue.
Also, from what I understand, phones on 4G switch to 3G when a call comes in and my phone may not be doing that. Is there a fix for this?
EDIT: As additional info, I am able to make outgoing calls without issue on 4G.

Are you actually using AT&T as your cell provider?

Yes, and I made sure my APN settings are correct.

It's a known issue. AT&T's implementation of Voice over LTE (VoLTE) which they call "HD Voice" for some reason interferes with voice calls on custom ROMs on this device.
No real fix, aside from calling AT&T and asking them to turn off the HD Voice feature of your account. May need to ask for a 2nd Tier tech support to do it. Others here have posted they had to do that (and 1st Tier either had not clue what they were talking about, or wrongly claimed it can't be turned off).
Other threads discussing the issue:
https://forum.xda-developers.com/showpost.php?p=62001970&postcount=28
https://forum.xda-developers.com/htc-one-m8/help/receive-calls-make-detailed-thread-t3146670
https://forum.xda-developers.com/htc-one-m8/help/m8-receive-calls-flashed-wrong-rom-4g-t3365488
https://forum.xda-developers.com/htc-one-m8/help/phone-receiving-calls-help-appreciated-t3382019

Awesome. Thank you!
EDIT: Just finished working through the issue with an AT&T rep through online chat. Had me turn off my phone, disabled it on their end, and turned it back on. Did a test call and sure enough 4g switches to 3g as the call comes in and switches back afterwards. Problem Solved!

No phones calls in France

Hello, I bought an S7A on eBay. I unlocked it with the GSM unlock code provided. Everything works fine, except ... I can't make or receive calls. When I make a call, no ringing tone, and it hangs up 20 seconds later. When someone calls me, the same, then they come across my answering machine.
I'm on the latest version of Oero available, no root or whatever. From what I saw (on GSMArena), the phone uses compatible frequencies in France.
I am at carrier Bouygues Teelcom.
You have any ideas ? Thank you !
PS: I translate from French, please be indulgent!

Same problem, this phone does not work in China

Since then I have understood the real problem: the phone cannot switch from the 4G network to the 2G network for calls on its own.
I don't know how I did it, but now I can make calls without any problem, but switching to 2G is very long (15 s).
I specify that it is impossible to use VoLTE to circumvent this problem.
For receiving calls, the phone does not switch to 2G and the incoming call still fails.
But I can force the 2G network (With the Samsung Band Selection app). And there, incoming calls work, but we only have 2G to surf.
When connected to WIFI, the phone automatically forces the mobile network to 2G, so incoming calls work without the application mentioned before.