How to distinguish between GSM and GPRS? - Windows Mobile Software Development

I made a program to obtain band strength values mixing tstril and some instructions posted in this forum. Now I pretend to distinguish between GSM and GPRS, because if GPRS is not connected it returns a GSM value.
Any ideas?
P.D.: if possible, does anybody knows how to measure GSM when GPRS is active. All of this was made using the functions shown in ril.h
Thanks.

Related

No Service

I had no problems with my local gsm carrier which operats on 1800Mhz band until a new carrier arrived in the market operating on 850/1900 (not yet launched but testing). Now very often I only see the 850/1900 carrier, to which I obviously cannot connect, and I cannot see my carrier for long periods in certain locations. My phone then shows, "No service".
At these "no service' times everyone around my is able to see my carrier on their handsets. I have also experienced a version of this in roaming also but it's real problem at home. Seems like the radio searches for 850 or 1900 first and if it finds any a network it stops searching.
Friends with Treo 850s had the same problem but there were able to choose a preferred band. I also recently heard of other users of Windows 2003 devices in my area having the same problems on non-imate handsets.
I have read about newer radio versions like 1.13 and 1.15 but it is not clear to me if there address this problem at all. I also saw a band switching tool but that was for the Wallaby ROM. Has anyone experienced this problem and if so what can I do?
My software stack on my phone is the latest imate PDA2K releases:
ROM version: 1.40.00 WWE
Radio version: 1.12.00
ExtROM version: 1.40.176 WWE
Ronald
What happens when you do a network search? You might want to try setting your network selection to manual as well since it seems that the new GSM 850/1900 (according to GSMWorld.com it is Digicel) network is causing some kind of reception issues for you.
You are correct about where the interference is coming from. I have tried using manual but my phone begins searching, gives me the option of selecting Digicel (850/1900) but my carrier (1800) is not shown.
Triband81 said:
What happens when you do a network search? You might want to try setting your network selection to manual as well since it seems that the new GSM 850/1900 (according to GSMWorld.com it is Digicel) network is causing some kind of reception issues for you.
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Dual SIM with HTC Tytn 2

I'm trying to use a dual sim adaptor with the Tytn2, but when i turn on the device i get a message saying "smartchip not allowed" and then there is no signal. what can i do?
I can't help you, but i have the same problem... Is it possible to do any changes in the registry?
There is a solution for this problem I've just found it by accident when searching for the same topic. Here are the quotes of people on the forum dedicated to this problem:
"In order to solve this issue, we suggest you to change the network parameter’s of your mobile.Please desable the automatic mode and choose GSM (only) for the network and select GSM (900+1800) + UMTS (2100) for the band selection"
However there is a price for this: "Changing to GSM is disabling all 3G/HSDPA function on the device, so your data speeds will be limited to standard GPRS (50kbps) or Edge, where available (up to 120 kbps)"

Questions about band setting

I live in the UK, and am using a foreign version of a TP2 that I bought on eBay. I think it's probably the Hong Kong version - it's in English, but with support for Chinese characters on the keyboard.
Something I do fairly regularly is switch between 2G and 3G modes on my TP2 manually. I've created a start-menu short-cut to CMBandSwitching.exe which lets me change the phone's Band setting between "Auto", "GSM" and "WCDMA". My somewhat limited understanding of these settings is that "GSM" basically means "2G", and "WCDMA" basically means "3G". When I set the phone to "GSM" it picks up GPRS or EDGE signals (according to the status bar). When I set it to "WCDMA" it picks up HDSPA or 3G signals (if there are any). What I thought "Auto" mode did was simply switch automatically between 3G and 2G mode depending on 3G signal strength - so that if there's a 3G signal it uses that, if not, it uses 2G.
However, it seems like there may be slightly more to it than that. If I have the phone in GSM mode at home and search for available networks, it finds O2, T-Mobile, Vodafone and Orange (in that order - does that mean O2's signal is the strongest, or does it put it at the top of the list because I have an O2 SIM?) In WCDMA mode it only finds O2, which would suggest that O2 is the only 3G signal that can be picked up in my home (and even that's pretty weak ). However, if I set the phone to Auto, then search for networks, then it also starts to get a signal from the 3 network and lists all 5 carriers - in other words, in Auto mode it finds a signal which is not visible in either GSM or WCDMA mode. This suggests that Auto may be doing something else besides switching between 2G and 3G. Can anyone explain this?
Also, if O2 is the only network it can find when set to "WCDMA" does this mean that O2's is the only 3G signal I can receive?
Finally, there are four possible frequency settings in the lower part of the BandSwitching app. These are:
Auto
GSM(900+1800)+UMTS(900+2100)
GSM(1900+850)+UMTS(1900+850)
UMTS(2100+800)
Which is the best setting for UK use? I'm currently using the second one, and it seems to work okay, but would I gain anything by switching it to "Auto"? And can someone give me an idea of which areas in the world I could get decent 2G or 3G reception with that selection of settings available?
(bump)
No one...?

How to re-enable GPRS for HTC Twin1000 (T5399)?

Hi, guys,
I got a HTC T5399 which is said to be Twin 10000, this dual mode phone is on the China market, customized for China Telecom CDMA2000 network, although it also supports WCDMA at the same time according to its brochure.
My problem is that GPRS functionality is disabled deliberately by the manufacturer when I want to use it under WCDMA network with my UK O2 sim card. Of course the voice calls are fine under WCDMA as it's supposed to. When I attempted to establish a new Internet connection, the options of line types are only three types: cellular line, bluetooth and Hayes modem on com port, there is no option of GPRS cellular line available as normal WCDMA 3G phones do. I tried to set up the connection with cellular line anyway but failed to connect to the network.
After googling on the Internet without any progress, I finally have to come here for help, as this website is for the best WM experts in the world. If I can not get it solved with your guys help, I don't think it's possible to sort it out anywhere else.
Thank you very much in advance for your kind support!
Sorry, forgot to let you know, the above device OS is WM6.5, details are
Windows CE 5.2.21869 (Internal version 21869.5.0.82)
Desperately awaiting feedback.....
no solution???
sadly, no one knows?

WCDMA / GSM auto problem

Hello Guys,
I'm experiencing a problem with my Froyo Desire for probably a week now.
The thing is that in certain areas my Phone can not receive calls / sms or such. In other words "GSM services" dont work. 3g though works fine (stable, strong and fast connection) My Provider is T-Mobile.
After quite a lot of testing I was able to isolate the error:
When WCDMA / GSM is chosen by the phone automatically it seems to me as if it didnt switch "back" to register with my provider via GSM when i want to make a call or if someone wants to call me.
When i switch to "GSM only" manually everything works fine but i have no 3g of course.
I also experience this problem only in certain areas. I live in an area where there is really strong HSDPA available (up to 7mbit\s). When i go to other places of my city i still get HSDPA (not as strong) but calls / sms still work.
The last paragraph may be of no importance, i don know.. probably it helps..
I have googled quite much about this problem and also found a few persons experiencing the same issue but nobody was able to come up with a solution.
I would be very thankful if someone could try to figure this out.
schnip
push______
Hi Guys,
... exactly the same problem here!
- same device
- t-mobile germany
- problem exists only in specific cells
ideas or solutions welcome
LordKnut.
gsm only Desire?
I'm having a nightmare with 3g 2g connectivity on my Desire on the three network whilst at home. If I could manually select gsm only this would be fine as I could still call and text and use wi-fi. Unfortunately my options are gsm/wcdpa (or whatever) auto or the 3g only.
can someone please advise if it is possible to select gsm only and if so, how?
many thanks
Can someone please advise me how if possible, to set the desire to gsm only?
VKeane said:
Can someone please advise me how if possible, to set the desire to gsm only?
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Wireless and network-Mobile network- should be here somewhere.
Thanks, but there is no option for gsm only. It's wcdma only or gsm/wcdma auto. there has to be a way around this.
Similar problem, different version
I've experienced similar problem.
In some area, I can get steady grps signal when I switched GSM only on; but when I switched WCDMA/GSM on, I could get no data connection at all.
I'm using China Unicom's mobile service.
Solution
Hi there,
I've the same issue and I fix it allowing the option GSM/WCDMA Auto in the configuration menu.
Then enter the following code *#*#4636#*#*, select "phone Information" and set preferred network type, set "GSM car (PRL)".
Sorry about my bad english.

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