How to change the default +0 GPRS!...

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I 'm experimenting problems to setup a GPRS connection with my local cellualr provider, because it seems that here in MEXICO, you need to configure +52 55 *99# intead of +0..... (tmobile default configuration) I own a TMOBILE XDA PW10B1 ROM: 3.08.10 ENG, Radio Version: 6.02

Can anybody help me to do this configuration?

Sounds like your GPRS operator needs to go on a course

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A GPRS handset doesn't actually dial a number. The *99# is used as a code to tell the phone to connect to GPRS it is not sent to the network.

There are actually 3 ways for a GPRS phone to connect to a GPRS network
ATD*99# (or ATD*99***1# on some handsets)
AT+CGACT=1
AT+CGDATA=1

The last two don't work in practice as once you are connected you need a PPP link to do anything useful.

You do need to tell the phone what Access Point you wish to connect to (the bit after the +0~ on the display, which can be removed by tweaking the Dialing Locations section). This is done by the AT+CGDCONT command, but as all AT commands are 'hidden' by Pocket PC the Connection Manager sets this before it connects.

The customer care person in Mexico simply doesn't understand how GPRS works. Unfortunatly few customer care staff do elsewhere in the world either.

Thanks for your replay.

how can I tweak the Dialing Locations section?

I'm new in this kind of tech.

Start\Settings\Connections\Connections\Dialing Locations\Dialing Patterns

Replace everything (or just International Calls) with g.

Mind you it will make no diference to the GPRS operation of the device, only the display of the "dial string" in the message window.

I works!!!! very well. It fells a litte bit slow, but it works... Thanks.

Is that possible to somehow see what AT commands have been used by the connection manager/pocketpc?

I have GPRS working on pocketpc, but I couldn't get it working using AT commands magic and with pppd (under linux, not on the XDA, but the same SIM/network.).