Develop Bugs

HSDA <-> UMTS automated switching?

I've seen in my TyTN, WM6, radio 1.34 a (strange?) behaviour. I noticed with VODAFONE : I have a plain UMTS connection 3g icon and 3g data connection alive, used for push e-mail.
When I am in HSDPA area and data connection starts data transfer, I see a switch between 3G and H connection, then revert after 1-2 seconds ad the end of data transver back in UMTS mode.
Hypotesis:
1) Could be a simple WM6 LVSW edition bug
2) Could be a WM6 feature (HSDPA has well known problems in voice phone avaliability when active)
3) Could be a Vodafone Network feature, HSDPA onli when needed
4) 1.34 radio compatibility problem/feature?
5) ......
6) I am stupid and this is a well known fact
Question:
Any other wm6 user noticed same behaviour?

It has always worked like this, HSDPA is ON when you need it, not all the time.
thats part of the design, saving resources for the network.

elivne said:
It has always worked like this, HSDPA is ON when you need it, not all the time.
thats part of the design, saving resources for the network.
Click to expand...
Click to collapse
This isn't working this way for all mobile phone providers in Italy, with TIM if you are in HSDPA area it will stay connected... and you're off-line if someone calls
May be we discovered why isn't enabled as DEFAULT setting and we need to enable using SetHSDPA.exe

sergiopi said:
This isn't working this way for all mobile phone providers in Italy, with TIM if you are in HSDPA area it will stay connected... and you're off-line if someone calls
May be we discovered why isn't enabled as DEFAULT setting and we need to enable using SetHSDPA.exe
Click to expand...
Click to collapse
Ditto in Australia. If im connected to GPRS, the icon is permanently showing HSDPA... unless of course i only have GSM coverage (very rare!!).

In Taipei, it works exactly as elivne says... H only when needed.
Cheers

FWIW, I didn't experience proper "throttling" in and out of HSDPA mode until I upgraded to WM6 and radio 1.38 (not sure which to thank for it). Prior to that whenever I was in H coverage, the radio would run almost exclusively in H mode. Talk about battery drain! Currently I can run for almost 2 days between charges (and that's with push mail).
How a particular combination performs for you must depend a lot on the carrier, your locale, etc. Took a lot of "trial and error" for me.

Yep, I'm on UK T-Mobile, and my icon only switches from "3G" to "H" when it's active.
As vp3G says, it noticably saves battery power from the old "permanent HSDPA" behaviour. Although I can't claim to get 2 days usage out of mine.

It is a network feature. If you are inactive on HSDPA for t sec the network will downswitch you to UMTS ( called R99 ). Only 10 users can use the HSDPA at the same time and there is an inactivity timer ( t=10 sec) try to manage the traffic by moving inactive users to R99 ( max speed 384 kbps)

Thank you for sharing your knowlege Austin Boy....
..."and that's the way it is"
Cheers

austin_boy said:
Only 10 users can use the HSDPA at the same time and there is an inactivity timer ( t=10 sec) try to manage the traffic by moving inactive users to R99 ( max speed 384 kbps)
Click to expand...
Click to collapse
Really only 10 simultaneous users? Seems like the odds of getting a timeslice when you need it would be virtually nil.

The 10 limitation can be increased by any operator by adding Channel elements (Radios) or more when adding another carrier ( frequency). Europe has more spectrum than the US and it is possible to get two carriers ( 2x5MHz) and use one for speech and the other for data. In the US we are sharing the spectrum between GSM and UMTS. AT&T will be migrating GSM to UMTS gradually and using the 850 band for UMTS before moving to LTE (4G)

sub69 said:
Yep, I'm on UK T-Mobile, and my icon only switches from "3G" to "H" when it's active.
As vp3G says, it noticably saves battery power from the old "permanent HSDPA" behaviour. Although I can't claim to get 2 days usage out of mine.
Click to expand...
Click to collapse
I have a similar switching scenario.
Prior to flashing my Radio to 1.38.00.10 and ROM to Black 2.0 I tested my download speed at www.dslreports/mspeed and was please to see I got almost a 1Mb/sec rating.
However since the flashes I have re-tested and am now only getting 250-300 kb/sec. It may be the network, so I will try on a few separate occasions and different locations.
NB. I have enabled HSDPA in HTweaksC
I noticed during the test that the download bar jumps staright up immediately but then slows down quite a lot?

sergiopi said:
I've seen in my TyTN, WM6, radio 1.34 a (strange?) behaviour. I noticed with VODAFONE : I have a plain UMTS connection 3g icon and 3g data connection alive, used for push e-mail.
When I am in HSDPA area and data connection starts data transfer, I see a switch between 3G and H connection, then revert after 1-2 seconds ad the end of data transver back in UMTS mode.
Click to expand...
Click to collapse
3 ITA is working same way.
Enabling HSDPA only when there is data transfer active.

Okay tried again on my commute home, and also when I got to my house.
Speed is looking good ! getting up above the 1mb/sec rate again.
Must have just been a busy cell/network

ok... i have a spv m3100 with black 3.0.1 wich is suposed to be HSDPA enabled... i have also enabled it in the tweaker.... today for the first time i have seen the icon H... in my area there is no HSDPA coverege... none... but i read today that untill the end of the year they are trying to cover it... and i was thinking that they are already making tests... i tested my speed at http://www.bandwidthplace.com/speedtest/ and i had a 145 kilobits per second speed... wich as far as i know it is similar to 3g... i disabled the HSDPA and tried a few times in 3g... the speed was 135 kb/s... to small the difference...
so... my question... what is the tweaker doing?... enableing HSDPA or just replacing the 3g icon with the H icon?

no one???
what is the tweaker doing?... enable HSDPA or just replacing the 3g icon with the H icon?

How to limit HSDPA ramping

Hi all. I was wondering whether anyone had any tricks to stop the PDA from using HSDPA unnecessarily. I find if I'm logged onto MSN all day, with just UTMS the battery would last probably 12 hours or so, but if I enable HSDPA it would clean out the battery in less than 5 hours.
MSN can't possibly require that much bandwidth. Is it possible to limit the phone from changing to HSDPA unless the bandwidth is actually required (i.e. when I connect my laptop to if for internet)
I use a dopod d810 in Australia with optus.
Thanks.

viperx said:
Hi all. I was wondering whether anyone had any tricks to stop the PDA from using HSDPA unnecessarily. I find if I'm logged onto MSN all day, with just UTMS the battery would last probably 12 hours or so, but if I enable HSDPA it would clean out the battery in less than 5 hours.
MSN can't possibly require that much bandwidth. Is it possible to limit the phone from changing to HSDPA unless the bandwidth is actually required (i.e. when I connect my laptop to if for internet)
I use a dopod d810 in Australia with optus.
Thanks.
Click to expand...
Click to collapse
If you don't need 3G, switch the phone to GSM, which would use EDGE/GPRS, or use tools such as bandswitch etc. If you want to completely stopped data connecting by itself, try nodata.

viperx said:
Hi all. I was wondering whether anyone had any tricks to stop the PDA from using HSDPA unnecessarily. I find if I'm logged onto MSN all day, with just UTMS the battery would last probably 12 hours or so, but if I enable HSDPA it would clean out the battery in less than 5 hours.
MSN can't possibly require that much bandwidth. Is it possible to limit the phone from changing to HSDPA unless the bandwidth is actually required (i.e. when I connect my laptop to if for internet)
I use a dopod d810 in Australia with optus.
Thanks.
Click to expand...
Click to collapse
Also, with some service provider, if the phone is connected to HSDPA, my incoming calls get sent to voicemail. If it is in normal 3G mode the call comes through. This has been a problem in many areas. As the last poster pointed out, Bandswitch can disable HSDPA so that 3G is the default mode. Since I don't have an unlimited data plan, I just change the band to GSM and use Edge unless I have to download big web pages or use the Video phone, then I switch to WCDMA mode.

Problem is, I use WCDMA all the time. I connect my laptop to the internet through my PDA. At these times the HSDPA is greatly valued. However, when I'm not and just want MSN messenger on my PDA, well, its a great battery drainer for no good reason.
At the moment I'm getting around this by turning HSDPA back on when I use the laptop and then off again when I don't so it just uses UTMS. However this is pretty annoying having to reset it every time.
Does bandswitching between GPRS and HSDPA require reset?

My carrier - 'MY MAXIS' is somewhat smart. They usually kick you out of HSDPA Network whenever you are not consuming large amount of bandwidth. The phone automatically switches to 3G , but then you are still connected. Then it will switch back to HSDPA whenever there is a sudden burst of data or so. Smart way of conserving HSDPA slots.
I don't think you can limit HSDPA bandwidth or so. Once its connected , its connected. It has nothing got to do with battery. Its just the power consumption. You have no choice but to disable the HSDPA module , so that it does not drain the battery a lot. Limiting bandwidth does not work. HSDPA/UMTS drains a lot of power.

Mine does that too... drop down from HSDPA to UTMS. But the difference between having HSDPA enabled and disabled in terms of battery life is like a third.

Its because if you enable it. It connects to HSDPA , hence it uses up more battery power. HSDPA loves to drain your battery life. This is why , you should switch to EDGE/GPRS whenever you are in mobile and switch it back to 3G whenever you wish to use it as a modem. You dont have any other choices ,mate !

[q] mms / 2g / 3g / 3g+ ?

Hi, is it possible to receive MMS messages on 2G network ? (by disabling 3G/ 3g+) ?
So actually, my question is : what do i miss if i set my network to be 2G instead of 3G ?
I ask this to optimize my phone battery use...
thanks
Nico

Yep - you can receive MMS on 2G network. (well at least on 2.5G using GPRS)
By using 2G network you will find that browsing is going to be slower. You will probably find the network strength is better and because you phone isn't searching for a network all the time you will have better batery life.

oki and what about google mails ?

Google mail will work but downloading of emails will be slightly slower on 2G than it would on 3G.

drey_p said:
Google mail will work but downloading of emails will be slightly slower on 2G than it would on 3G.
Click to expand...
Click to collapse
ok
thank you for all those information. I'll now switch my phone back to 2G, in order to improve my battery stats. Then I will use 3G only when I need Internet.
Bye
Nico

That is pretty much what I do because I find the 2G signal to be a lot stronger and it really seems to help improve the battery life.

3G only instead of HSDPA? is there a way?

is there a way to only allow UMTS on my Xperia Arc instead of HSDPA(WDCMA only in settings)? as UMTS is > 384kbit/s and HSDPA up to 7,2Mbit/s and HSDPA is draining my battery down to its limit and my phone's gettin hot.. sometimes I see a 3G symbol in the notif. bar but my connection then doesn't work.. I called the o2 service center and they told me that it's possible to get UMTS in my location.. really gettin on my nerves..-.-
thanks !

I doubt that's what's draining your battery. I know for sure some operators support FastDormancy which kicks the phone back down to 3G from HSPA when data isn't being used. Rogers in Canada does it. AT&T in the US does not support it though so my phone always sits on HSPA unless it's a really ghetto old tower.
You might want to see if modifying some of the flags in build.prop will disable HSPA (I know you can set EDGE class type for instance). You will just need root and a text editor and reboot after any modification.

and how to set umts only mate?

UMTS drains as much as HSDPA I guess or there isn't abig difference, at least for me.
I don't know how to get UMTS only...
Sent from my iPad 2 using Tapatalk

so there's no way?! because while browsing over HSDPA network my phone will drain like 10% battery in just 10 minutes and thats inacceptable for me! over 3g on 2.3.3 where i had found a way to disable hsdpa it drained like 3/4% in 10 minutes..

realfelix said:
so there's no way?! because while browsing over HSDPA network my phone will drain like 10% battery in just 10 minutes and thats inacceptable for me! over 3g on 2.3.3 where i had found a way to disable hsdpa it drained like 3/4% in 10 minutes..
Click to expand...
Click to collapse
Again that is *NOT* normal drain. Check your baseband version, I use -58 and hardly have any drain on HSPA or 3G (it's about the same), use EDGE if you want to save battery. (use latest flashtool to flash different baseband versions)
You're looking to modify build.prop or find some program that modifies it for you, you must have root to do this. I don't know the exact option in build.prop, but that's all I can help you with.

i have -58 baseband .. what's your battery life then when browsing like 10-15 mins?

3g signal: ICS vs IOS5

Is it possible that the iphone 5 has better 3g reception than our arc(s)?
This is especially noticeable indoor, my friends iphone 5 can download at 800kbps where my arc has difficulties even connecting with the 3g network on the exact location and time and carrier, so it forces me to download over 2g and even this is slower than average(5 kbps).
Also when in settings i choose (3g(preferred) / 2g) my phone is a lot of the time without signal, so the switch to 2g isn't working that good. Often calls from friends are directed immediately to voicemail. Sometimes when my phones comes out of standby, then it connects to 2g, so the rest of the time it was constantly without signal.... frustrating! That's why I put it most of the time on 2g only.
Yes i've got the correct carrier apn settings. (outdoor my 3g can download @ > 1500kpbs)
same issue on different basebands, first on 77 now on 83, no difference there.
not rom related: first on jj'shybrid now on uhd 2.0.3 (locked BL).
Someone with the same issue?
You know what will be a good solution if the setting would be "2g(preffered) / 3g", so only when mobile data is switched on and a decent 3g connection is found it would switch to 3g and the rest of the time it would stay on 2g. This is probably kernel related, but does custom kernels have this feature?
Thanks

Yes. Lol
IPhone is newer.
Sent from Xperia Arc S

iPhone might have stronger antenna than Xperia phones.
ROMs have nothing to do with it. If your phone is rooted, you could try using some 3G improvement tweaks.