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GPRS CLASSES: Bad news, the xda still doesn't works as a Class B device
Posted by Arne Hess - on Saturday, 09.11.02 - 13:50:00 CET under 02 - Windows Mobile News - Viewed 7369x
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You remember the 64 MB xda announcement some days ago? o2 announced the new xda as a Class B GPRS device which would mean it can handle GSM voice and GPRS in parallel (even if this doesn't mean it could handle both simultaneous, in that case it would be a Class A device - find more information about the different GPRS classes in this PPCW.Net Forum thread).

Well, "Deeps" from Indonesia bought one of the new 64 MB xda's and reported the following on the Forum:

"I just sold my old XDA and bought a new 64mb with extended GPRS capabilities. It is suppose to be Class B, Multislot Class 8 (4R1T) . My new Rom version is 3.14.17 and radio version is 4.08.

The problem is although I see an increase in GPRS speed, the GPRS connection still disconnects when a phone call is coming in. A class B device is suppose to just suspend the GPRS during a call or SMS and resume GPRS connection automatically after that."

Ouch, this really sucks. Announcing a device as Class B device which is still a Class C device isn't user friendly at all. Beside this, the xda is the only Class C device I've ever seen. Here o2 and HTC really have to deliver a fix that the xda - doesn't matter if 32 or 64 MB - becomes what is state of the art today: a Class B device!

Cheers ~ Arne


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Posted by Jerome on 10.11.02 - 00:00:00

I think I should precise here what "Class B" means : a Class B device is a device that can be both "IMSI Attach" and "GPRS Attach" but cannot transfer data in GPRS mode while a circuit (GSM) call is active. Considering this definition, the Wallabies (XDA, T-Mobile, ...) are indeed Class B devices otherwise you could not receive a call while connected in GPRS.
IMHO this is just bad design from Microsoft "RAL Radio Application Layer" and I really hope this will be fixed in new releases of PPC2K2PE and SP2K2 along with the "when I turn off the device, my GPRS connexion is cut" sad

Posted by Arne Hess on 10.11.02 - 00:00:00

Hmmm, I understood the classes like this:

Class A mobile phones can be connected to both GPRS and GSM services simultaneously.

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 mobile phones are attached to either GPRS or GSM voice service. You need to switch manually between services.

BTW: The MS Radio Application Layer couldn't be the problem because the WDA handles GPRS and voice correct as far as I remember...

Posted by John on 11.11.02 - 00:00:00

The problem is with the Microsoft Pocket PC operating system.  Sources from Microsoft say it will not be fixed before Q103.

The problem is that the Suspend and Resume procedures are not supported.  This means that the device isn't Class B, and isn't Class C either.

Another related issue is that the devices delete the PDP context when the power save on the device kicks in.  Again this is done without informing the network.

Posted by Deeps on 11.11.02 - 00:00:00

Deeps here again. What John writes about his gprs getting disconnected during standby can be handled with the new 3.12 firmware ( John must be using the 3.07 which doesnt have this KEEP GPRS CONNECTION DURING STANDBY feature in the settings section)

I truly hope O2 or microsoft resolves this problem soon as with the problem solved, I would without any doubt call this the best product Ive ever used. ( for your information, I have changed my mobile at least 20 times this year, trying out every one available in the market)

I have also tested the beta version of the P800 sony ericcson. Very sleak looking but my beta set still had some software bug( quite slow). The screen looks gorgeous but had one suggestion, not everyone would like the blue white (kinda kidding) casing. Should come out with a more sleak and classy (8910?) ones for the professionals.



Posted by E.Bryce on 12.11.02 - 00:00:00

How does one get the updated firmware of 3.12 my T-Mobile USA(1900 not 900) device is running 3.08.10 ENG T-Mobile keep referring me to the site they don't seem very smart over there at T-Mobile USA

Posted by JP Labat on 12.11.02 - 00:00:00

I had mine in Singapore end September and its running 3.12.07 eng and radio 4.06. It really behave like a class C saving context (you reconnect to gprs from where you left it after your voice call. If you leave the GPRS up it will stay up even if you turn it off.
Do you have any ideas how to upgrade the rom and radio versions?

Posted by Jamie Pride on 15.11.02 - 00:00:00

I have experienced a simmilar problem. I am running the lastest 64mb version of the O2 in Australia on  the Telstra network, and when I receive a call it disconnects (not suspends) the connection - so you have to reconnect.

Posted by Anonymous on 22.11.02 - 00:00:00

I have a Xda and I would like to do fax with it. Does anyone know a software to do fax with this PDA ? (I searched but didn't find anything).

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