Database Users

Switch between GPRS and UMTS network

Hello,
I know the place in the phone options (on the band page) where you can
change the network from GPRS to UMTS (3G).
But is this possible to do programmatically with RIL or TAPI or another API
on the pocket pc device?
Thanks for any suggestions.

I support this request; Many topics on the board cover erratic behaviour with JJ, and ppl return their device to no avail. Swopping to another operator often helps. The issues SEEMS to be a poor UMTS reception with a given SIM or location, and this results in JJ trying to connect to UMTS or even latching on to UMTS but with an abysmal signal. After more than 15mins (annecdotal) of this is fails to ever go back to GSM without a reboot.
Solution is to turn off UMTS, but that's darned inconvenient cos you OFTEN want 3G speed (mail, RSS, google/surf).
Here's a way forwards; can someone tell us what reg entry gets changed when we select GSM vs UMTS? I will then write a couple of .reg files that can be launched from iLauncher (or whatever). Buzz coule probably write a switching app like he did for BT.

i have the same problem
When i use my Universal at home, there is pretty low level of UMTS/WCDMA signal and full level of standard GSM signal. By default Universal changes between those two sources automaticaly. But in my case, the quality of WCDMA signal is often varying just around critical level. So the result is that Universal changes band to GSM and back. And then again. And again. And... Due this, there is sometimes not possible to make data connection, because Uni is so much occupied by changing bands back and forth...
I would like to find a better solution, than select only GSM manually in phone settings. Especially because i have to unselect it manually every time when leaving home :-(
Is there any way to set treshold value (i expect increase it) for automatic switching between WCDMA and GSM?

I still do not know how to switch from UMTS to GPRS and back
with some API function (or AT command) on the device.
If I get these Infos from someone that would be great.
Then I could write a tool that checks the signal quality
and the network status and if UMTS signal is too low
it will activate GPRS.
I think this can be done with RIL API but have not found
any infos.
Houser

Anything new aobut this umts switch problems??
I do have the same problems, often i am unable to make calls, always when umts is on...
would be happy to hear something,
thomas

craigiecraigie4 said:
I support this request; Many topics on the board cover erratic behaviour with JJ, and ppl return their device to no avail. Swopping to another operator often helps. The issues SEEMS to be a poor UMTS reception with a given SIM or location, and this results in JJ trying to connect to UMTS or even latching on to UMTS but with an abysmal signal. After more than 15mins (annecdotal) of this is fails to ever go back to GSM without a reboot.
Solution is to turn off UMTS, but that's darned inconvenient cos you OFTEN want 3G speed (mail, RSS, google/surf).
Here's a way forwards; can someone tell us what reg entry gets changed when we select GSM vs UMTS? I will then write a couple of .reg files that can be launched from iLauncher (or whatever). Buzz coule probably write a switching app like he did for BT.
Click to expand...
Click to collapse
HKLM\SOFTWARE\OEM\UMTS
OPMODE=0/1/2 (AUTO/GSM/UMTS)

Disable UMTS

Does someone know how to disable UMTS for the Trinity?
I've searched on the forum but I couldn't find any good solutions

Settings -> Personal -> Phone -> Band -> Select your network type -> GSM.

Try this...
http://commmgrpro.com/_wsn/page3.html

bonisalive said:
Try this...
http://commmgrpro.com/_wsn/page3.html
Click to expand...
Click to collapse
I use this Bandwith app also. However, if you really want to turn off HSDPA and leave on 3G permanently you can use the app on this page called HTweakC http://wiki.xda-developers.com/index.php?pagename=Hermes_Registry
I turn off HSDPA because it blocks incoming calls (my carrier's problem). I can receive calls normally with 3G.

Thank you for that Band Tool. I'm a little confused by something, though. Does it save battery life to disable UMTS? I don't need any 3G functionality at all currently, so does it make battery sense to disable UMTS?
Thanks very much.

WilliamG said:
Thank you for that Band Tool. I'm a little confused by something, though. Does it save battery life to disable UMTS? I don't need any 3G functionality at all currently, so does it make battery sense to disable UMTS?
Thanks very much.
Click to expand...
Click to collapse
I beleive that it will. UTMS drains the battery quicker as the phone searches for cells more frequently than it does on GSM

korben said:
I beleive that it will. UTMS drains the battery quicker as the phone searches for cells more frequently than it does on GSM
Click to expand...
Click to collapse
Thank you. Is there a way to make the Band Tool work every time you turn the phone on? If I turn my phone off and on, the tool resets and I'm back to 3G mode.
Thanks again.

Check out Trinityhacks...
http://forum.xda-developers.com/showthread.php?t=300783&highlight=trinityhacks

korben said:
Check out Trinityhacks...
http://forum.xda-developers.com/showthread.php?t=300783&highlight=trinityhacks
Click to expand...
Click to collapse
Thanks again for the reply. I installed TrinityHacks, but it's a little confusing with the whole band selection. I see auto, or GSM+UMTS selections. I don't see a GSM without UMTS. Did I miss something?

Bandswitch settings should persist through a soft reset- mine certainly do. Make sure you leave anough time for the registry changes to save before exiting the program, or doing a soft reset.
UMTS typically uses 3x the current that GSM uses as 3G is a much weaker signal. so the gain needs to be much higher. And in marginal reception areas, the constant hunting between bands further hits the battery

NeilM said:
Bandswitch settings should persist through a soft reset- mine certainly do. Make sure you leave anough time for the registry changes to save before exiting the program, or doing a soft reset.
UMTS typically uses 3x the current that GSM uses as 3G is a much weaker signal. so the gain needs to be much higher. And in marginal reception areas, the constant hunting between bands further hits the battery
Click to expand...
Click to collapse
Well I find it all bit a confusing! Gah! I uninstalled that Band Utility, and installed the Trinity Hacks. Not sure what setting to use to make sure it's 2G. Am I correct in assuming that G at the top of the screen means 2G, and 3G = 3G?

Yes
G=GSM; 3G or U = UMTS; H= HSDPA, (but only shows during data exchange)

Ah ok thanks for that! I think something got messed up, because before it would say 3G at the top of the screen, and my network was identified as UMTS Vodafone. Then I installed that Band Utility and switched to GSM only. Then I uninstalled that Band utility while I was on GSM only. So now I'm stuck on GSM, even when switching UMTS on in the Trinity Hack program. I'm so confused now.

Have you tried Phone/Menu/Options/Band and setting the top box to Auto?

NeilM said:
Have you tried Phone/Menu/Options/Band and setting the top box to Auto?
Click to expand...
Click to collapse
Yes, it's on Auto right now. I don't even see the *specific* GSM-only setting. Maybe Trinity Hacks doesn't have this feature?
*AH I got it*. I reinstalled Band Switch, put it back to Auto (so 3G worked again), and then uninstalled it. Trinity Hacks now works!
Thanks for the help!

How do I lower GSM settings to Edge from Umts?

Over here, in Calgary,AB,Canada, (Rogers network)we are seeing glimses of Umts appear on our connection icon, however, officially, we won't get to use the speed until they have further tested the 3g system and officially launched 3g in this part of the country. I have noticed that posters in XDA mention battery life is a problem when connected to UMTS, so, until I need the Umts feature (might be near end of year!), where or how do I actually lower the connection speed? I might as well have my battery lasting longer if I can. I have the 1.38 Radio Rom.and I noticed each subsequent Radio rom that is put out, works on getting better battery usage/connection (mostly comments on WM6 posts) perhaps because WM6 sucks more juice (just a theory). Thanks for the answer though to my originaly question if feasable.thx

Forcing GSM will save you some battery life.
Forcing GSM will save you some battery life.
Start>Settings>Personal Tab>Phone>Band Tab:
Select your network type:
Choose GSM

stukes said:
Forcing GSM will save you some battery life.
Start>Settings>Personal Tab>Phone>Band Tab:
Select your network type:
Choose GSM
Click to expand...
Click to collapse
Get bandswitcher...makes things nice and easy...use the search to find it

Polaris Radio problem solved!!

Hi,
If your polaris having radio problem after flashing with any custom ROM (or even default) and setting the radio to Murata radio, then you can try the following solution.
The problem may include:
- you have strong GSM signal but you cannot make a call ( for example 1 success out of 10 trials)
- you cannot receive any call (dropping call) not on purpose.
- The battery power drains quickly (..few hours till a half day.)
- The GSM signal is not stabile (strong but kept frequently searching again for signal).
I have tried many ways, from flashing to original ROM and set to any Murata radios, but the problem still presists. Then I did the following.
1. Flash the polaris with any original ROM
2. Flash the polaris radio with the latest official radio version ( I just used the one that included with the official rom that I downloaded from http://www.htc.com/www/SupportDownload.aspx?p_id=59&cat=2&dl_id=113)
3. When the phone is ready, go to the setting, the phone, and then the service. From there you will have two questions, then select the first question, and choose GSM instead of auto, leave the second question intact i.e. "auto".
4. Your phone will reset its GSM connection, and then just wait. It will display "G" next to the reception bar. Then you can test by making a call or receiving a call.
5. If you still have problem, try to disable the HSPDA or any 3G services.
In my case I have T-mobile, where in Europe it is claimed to work perfectly. Learning from IPhone 3g problem in US, where Apple and T-Mobile tried to blame each other, and looking back to "poor HTC support" I could suspect that HTC has not provided the (old) Polaris with "the right" 3G driver.
I hope it helps. Let me know.

Jagoan said:
Hi,
1. Flash the polaris with any original ROM
2. Flash the polaris radio with the latest official radio version ( I just used the one that included with the official rom that I downloaded from http://www.htc.com/www/SupportDownload.aspx?p_id=59&cat=2&dl_id=113)
3. When the phone is ready, go to the setting, the phone, and then the service. From there you will have two questions, then select the first question, and choose GSM instead of auto, leave the second question intact i.e. "auto".
4. Your phone will reset its GSM connection, and then just wait. It will display "G" next to the reception bar. Then you can test by making a call or receiving a call.
5. If you still have problem, try to disable the HSPDA or any 3G services.
Click to expand...
Click to collapse
I'm sorry I do not quite understand here ...flash official ROM and official radio? then what? can I then flash any cooked ROM? or ported radio from other device? Thanks.

i have an official rom 1.40.466.1 WWE with Radio rom 1.58.25.21 and also i had this radio and low signal problem since i got the phone, never had a good signal at home.
tried to set the band in phone settings to GSM as you said not AUTO and it worked like a charm. thanks a lot

Hi Deepthroat,
I just did it with the official ROM, (ROM version 3.13.405.0 WWE, Radio version 1.59.42.15). However, some reactions confirm that it also works for any custom ROM and Murata-radio. Honestly, I have not tried to any other combination, just give it a try on your current configuration.
Thus, you can skip step 1 and step 2. Just minor correction on step 3, you go to Settings, choose Phone, and choose tab Band (not service as previously posted), choose "GSM" on the "Select your network type", and leave "Auto" for the "Select your GSM/UMTS band" and finally OK.
In my case, now I still have my polaris battery fairly full even after one day. Before the battery already dropped to 50% or less in after one day.
Please confirm if it works, you will save a lot of desperate polaris owners....
thanks

I can confirm the band tab change: network type from auto to gsm and gsm/umts to umts 900+1200 + gsm 900+1800 as a solution to battery drain and poor signal related problems as written on the first post.
I'm using gullum's latest rom TF2D III with the latest radio rom 1.59.44.02.
My reception is excellent, GPS works good and battery drain is not dreadful.

About the fact that 3G is letting the battery drain very quickly.
This is not a problem, but it's just the way 3G works. 3G just requires more battery power to function.

JeFFJuH said:
About the fact that 3G is letting the battery drain very quickly.
This is not a problem, but it's just the way 3G works. 3G just requires more battery power to function.
Click to expand...
Click to collapse
I stand corrected, however I was referring to users who do not take advantage of 3G capabilities.

Jagoan said:
5. If you still have problem, try to disable the HSPDA or any 3G services.
In my case I have T-mobile, where in Europe it is claimed to work perfectly. Learning from IPhone 3g problem in US, where Apple and T-Mobile tried to blame each other, and looking back to "poor HTC support" I could suspect that HTC has not provided the (old) Polaris with "the right" 3G driver.
I hope it helps. Let me know.
Click to expand...
Click to collapse
It means that we can't use HTC cruise/polaris for video call ??
I bought the polaris at vietnam and then I used it at Indonesia using Telkomsel as carrier. before I have bad signal also after upgraded the rom to the 6.1 it became good reception for GSM connection but when I need to use the 3G/HSDPA connection there is no signal. (using Band selection )
I already upgraded the RADIO to 1.59.44.02 and the problem still the same..
could anyone help to give info how to activate the 3g connection ?
thx
JEfri

spektrumxdadevelopers said:
It means that we can't use HTC cruise/polaris for video call ??
I bought the polaris at vietnam and then I used it at Indonesia using Telkomsel as carrier. before I have bad signal also after upgraded the rom to the 6.1 it became good reception for GSM connection but when I need to use the 3G/HSDPA connection there is no signal. (using Band selection )
I already upgraded the RADIO to 1.59.44.02 and the problem still the same..
could anyone help to give info how to activate the 3g connection ?
thx
JEfri
Click to expand...
Click to collapse
As I understood, Telkomsel Indonesia has a deal with Siemens to implement 3G/W-CDMA(or popular with UMTS) but not yet HSPDA (http://www.thejakartapost.com/news/...n-contract-set-3gwcdma-network-telkomsel.html). The 3G/ HSPDA allows networks based on UMTS to have higher data transfer speeds and capacity, however not all countries have implemented it (this is commonly termed as 3.5G network). So I guess in that case, you should set the band setting tab, Networktype to "GSM" and Select your GSM/UMTS band to the one suitable to your operator.
The problem with current polaris radio is that it is still not efficient to distinguish GSM and W-CDMA networks that leads to many side-problems (stability, quick battery drain, not working camera and etc). Though, I have not tried, some of friends claimed that polaris can support perfectly video call. So you have to work hard to find the right setting for your net. provider.
goodlucks

Jagoan said:
Hi Deepthroat,
Thus, you can skip step 1 and step 2. Just minor correction on step 3, you go to Settings, choose Phone, and choose tab Band (not service as previously posted), choose "GSM" on the "Select your network type", and leave "Auto" for the "Select your GSM/UMTS band" and finally OK.
In my case, now I still have my polaris battery fairly full even after one day. Before the battery already dropped to 50% or less in after one day.
Please confirm if it works, you will save a lot of desperate polaris owners....
thanks
Click to expand...
Click to collapse
Oh ok, now I understand the relation between the battery drain and GSM band selection mode. I will try it Thanks for sharing with us.

Jagoan said:
The problem with current polaris radio is that it is still not efficient to distinguish GSM and W-CDMA networks that leads to many side-problems (stability, quick battery drain, not working camera and etc). Though, I have not tried, some of friends claimed that polaris can support perfectly video call. So you have to work hard to find the right setting for your net.
Click to expand...
Click to collapse
thanks for quick answer..
Actually I just want to use video call. Oh...very sad to hear that..
so do you think it's the polaris inherent problem that we can't do anything..?
I just try all setting..and I try also other operator like Indosat and proxl and the problem is same.
When I set the Band selection to W-CDMa or auto, sometimes After soft reset, polaris detect the 3G network but in 3 second dismiss and change to GSM network in most of the time just no signal.
everything is ok when I select the GSM only.
so no other option ?
thanks

spektrumxdadevelopers said:
so do you think it's the polaris inherent problem that we can't do anything..?
I just try all setting..and I try also other operator like Indosat and proxl and the problem is same.
When I set the Band selection to W-CDMa or auto, sometimes After soft reset, polaris detect the 3G network but in 3 second dismiss and change to GSM network in most of the time just no signal.
everything is ok when I select the GSM only.
so no other option ?
thanks
Click to expand...
Click to collapse
If I were you, I will do the following:
Telkomsel requireshttp://www.telkomsel.com/web/info_3g, in Indonesian)
1. your phone is 3g (fulfilled by polaris)
2. You have registered to 3g service
3. You are in the area where 3g is supported
4. You have sufficient 3g signal.
In addition, Telkomsel uses 3G / UMTS / WCDMA / 2100 MHz. So if you have met the requirements, just set "GSM" and "GSM+UMTS 2100" in your polaris band tab (phone setting) and don't forget to enable the HSPDA in connection tab. If it does not work, reflash your radio rom to latest official release:1.59.42.15.
If it still does not work try to use 3g service in another supported handset (nokia or ericsson), if it works then it is the time to sell your polaris (just kidding!!!).
goodluck!!

spektrumxdadevelopers said:
so do you think it's the polaris inherent problem that we can't do anything..?
I just try all setting..and I try also other operator like Indosat and proxl and the problem is same.
When I set the Band selection to W-CDMa or auto, sometimes After soft reset, polaris detect the 3G network but in 3 second dismiss and change to GSM network in most of the time just no signal.
everything is ok when I select the GSM only.
so no other option ?
thanks
Click to expand...
Click to collapse
If I were you, I will do the following:
Telkomsel requireshttp://www.telkomsel.com/web/info_3g, in Indonesian)
1. your phone is 3g (fulfilled by polaris)
2. You have registered to 3g service
3. You are in the area where 3g is supported
4. You have sufficient 3g signal.
In addition, Telkomsel uses 3G / UMTS / WCDMA / 2100 MHz. So if you have met the requirements, just set "GSM" and "GSM+UMTS 2100" in your polaris band tab (phone setting) and don't forget to enable the HSPDA in connection tab. If it does not work, reflash your radio rom to latest official release:1.59.42.15.
If it still does not work try to use 3g service in another supported handset (nokia or ericsson), if it works then it is the time to sell your polaris (just kidding!!!).
goodluck!!

Jagoan said:
if it works then it is the time to sell your polaris (just kidding!!!).
goodluck!!
Click to expand...
Click to collapse
I already all of your suggestion before you mention that... my cruise radio rom already upgraded to what you suggested...
oh sad... I should sell it ...

Can any one give me a direct link for that update ,
as when i enter my mobile S/N on download page it says that
Sorry, this software download is not suitable for your device.
plz help me am suffering from that problem

engmazen said:
can any one give me a direct link for that update ,
as when i enter my mobile s/n on download page it says that
sorry, this software download is not suitable for your device.
Plz help me am suffering from that problem
Click to expand...
Click to collapse
exactly the same here,, this is so frustrating

Here's what you guys are looking for.
WorldWideEnglish (405) WWE:
http://dl.htc.com/downloadfiles/Rom....0_radio_sign_25.85.30.07_1.59.42.15_Ship.exe
Just tried this method and still am having horrid reception in Canada here under Rogers.

Data constipation? Irregular data movements? Constant disconnects?

Symptoms
- You cannot maintain a constant data connection. The connection is often lost or dropped.
- HD2 reception indicator dances between G to 3G to H despite showing good reception, and user remaining stationary.
Counter measures - No cabs or registry tweaks needed.
Presented in the order I would try them. If the lower number levels don't work, then move up a level. These are offerred as advice from a UK based HD2 user, though may work for you elsewhere.
LEVEL 1
- Go to Comm Manager > Wireless Controls
- Turn the Data connection Off then On again.
This will usually get you back and running again faster than waiting for the HD2 to sort itself out.
LEVEL 2
- Go to Settings > All Settings > Connections > Advanced Network
- Disable HSDPA/HSUPA
This will stop your phone attempting to use '3.5G' and will mean that you only use 3G.
Remember to re-enable HSDPA/HSUPA when you are in an area with better reception.
LEVEL 3
- Go to Settings > Wireless Controls > Phone - Change phone settings
- Move down to Other Options > Band - Change baseband
- Change Network Type from Auto to GSM
- Change Band frequency from Auto to either GSM (900+1800)+UMTS or GSM (1900+850) . To make the decision, you need to know the GSM frequency your operator uses. If you don't know, you can just try both of the GSM options and see which works. No damage will be done by using the wrong frequency first time, and you can change back.
This will disable 3G and force your phone to use 2G. Most operators have decent 2G networks, so you shouldn't have the disconnects anymore, but you will have slower than 3G potential speeds.
Remember to change your phone back to Auto for both Network Type and Band Frequency when you are in an area with better reception.

Thanks for the heads up... will have to try some of these. I find it most annoying at times...!

Thanks for the advice, I do find those issues annoying. What are the benefits of using 3.5G? If they're aren't any major advantages and turning this off helps then I may as well leave it off.

CHIP STAXMAN said:
LEVEL 1
- Go to Comm Manager > Wireless Controls
- Turn the Data connection Off then On again.
Click to expand...
Click to collapse
The problem with this is that it b*llockses up your push email settings, if you use the phone to get email from an Exchange server. The better approach (assuming standard configuration) is to press and hold the power/end-call hard-button. That brings up a menu of four choices. The last of those is "terminate data connection". Click it. Anything the phone does which requires the data connection after that will automatically reactivate it.

3G 2100
These tricks may solve the issue for many but not for me because I'm in a 3G 2100 only network so I cannot switch to GSM. I will try to disable HSDPA/HSUPA to see if that works though.
The weird thing is that the issue occurs almost exclusively when I'm logged on an IM client and the phone stays in sleep mode a few minutes (say 15 min or so). After I wake up the phone the signal seems ok but the data connection is lost (IM, browsing, mail, weather update, etc.). It doesn't happen every time but very often, several times a day.
If I don't log on any instant messenger app the data connection is stable, especially with the new 1.66 ROM (I tried both Duttty's custom and official). In this case I lose data connection very rarely, in fact I din't even remember the last time I did.
Can anybody provide an explanation for this, what is happening with the connection between the IM server and the phone during sleep?

snerkler said:
Thanks for the advice, I do find those issues annoying. What are the benefits of using 3.5G? If they're aren't any major advantages and turning this off helps then I may as well leave it off.
Click to expand...
Click to collapse
If your network supports it, you should have higher potential data upload and download speeds through using 3.5G (HSDPA/HSUPA).
In reality and every day use, on many networks you probably wouldn't notice the difference between 3G and 3.5G.
I'm on Virgin Mobile, which piggybacks on T-Mobile's network here in the UK. My speedtests in central London, show virtually no difference between me using 2G, 3G and 3.5G!!!! Which is ridiculous. The main difference I get as a HD2 user is much more stable data connection on 2G vs 3G/3.5G.