Hello everyone,
I have a SIM900 GSM Shield and I have some issues with it. I don't know if you ever have something like this, here we go:
-I'm using ONO carrier, at Spain that is a Virtual Carrier that works through Telefónica Movistar Antennas, but recently has been purchased by Vodafone ES, another carrier.
I'm trying to use ONO SIM to make it work with my Arduino UNO and SIM900 GSM, but when I type: AT+COPS? I get that the carrier is not displayed, but when I use Vodafone SIM, it works.
I'm using ONO and Vodafone SIM's at same place with lot of signal, at terrace of my house. Around of my house there's about four or five antennas.
I think that problem is the virtual carrier, someone has the solution to fix this?
Thanks in advance.