Unsuccessful GPRS login with Motorola G20

at+mipcall

Hi everyone,

I've read a similar thread here but had no answers, so I'll post my problem here. I'm trying to establish a GPRS session using a Motorola G20, and onto UK's O2 Pay-as-you-go GPRS service. My problem is once I try to log into the access point with the AT+MIPCALL command, it returns +MIPCALL: 0 with no further message and gives me no IP address. Roughly, the sequence of commands I'm using is the following, and the SIM card doesn't have the PIN number enabled:


I'm using the developer's kit, with the silly phone thing included, and on the phone screen I can read "GPRS session" once I activate the PDP context (AT+CGACT=1 command). I've successfully downloaded data with the same card using my own telephone, and (I believe) the same APN settings, so I'm sure GPRS is enabled and working with that card and network.

Any ideas?

Thanks everyone for your attention.

motorola g20

Ok, this one is unbelieveble.

According to O2, their Pay & Go cards do not allow for GPRS. So when I thought I was retrieving data through GPRS using my own telephone, I was in fact doing it through GSM and WAP. Now that doesn't explain why their settings are called "O2 WAP GPRS", why the Data Bearer in their settings appears to be GPRS rather than GSM data, or why they have GPRS settings for Pay & Go cards altogether! (they've got two different APNs, "mobile.o2.co.uk" and "payandgo.o2.co.uk", with different usernames as well).

So I don't know if I should take their word for it (reasonable) or not (suspiciously possible). Anyone's got more info on that?

On the other hand, I seem to have gone one step backwards anyway. Now, when I try to activate my PDP context with AT+CGACT=1[,1], with either an O2 P&G card or an O2 contract card, I get the following response:

+CME ERROR: 103

Which, peeking around the documentation, I find to mean "Illegal MS". And "MS" most likely means, in this context, "Mobile Station". So I have no [...] clue what it means!!

Then, when I've tried with a Vodafone Pay-as-you-go card, I've got to the same point (AT+CGACT=1,1), with a different error code:

+CME ERROR: 148

Unfortunately, that error is defined as "Unspecified GPRS error", so I'm again in darkness.

Has anyone ever been able to establish a, and retrieve data from, a GPRS connection in the UK, using a Motorola G20? How was it done? I'm about to go crazy, please someone help!!!

Cheers