I have a couple of SARA AFF modules, which I want to use with Vodafone SIM cards in the Netherlands. I am able to work through the example AT commands presented here for Vodafone: http://support.sodaq.com/sodaq-one/at/, except for the last one (AT+NSOSTF=...), for which I get an error. With AT+CMEE=1, I can see that it is Error 4, which according to the AT commands manual is "Operation not supported".
If I exchange the Vodafone SIM card for a T-mobile card, I am able to send a UDP datagram, and I have verified data arriving at my server. In one occasion, when taking both a new AFF board and a new Vodafone SIM card, I was able to send data. However, a few days later also this combination didn't work any more.
Any ideas what may be wrong?