Hi, Trying to test new official Arduino GSM Shield with Arduino Mega by uploading example codes from the website (TestGPRS, TestWebServer, Send/Receive_SMS, etc). However, codes are uploaded easily but as I open the serial monitor only the first lines are being printed (Connecting GSM Network...., etc) and nothing comes up (waited up to 30 mins), or when I try to send SMS its being printed that transaction is completed, but i don't get any messages. Even If i try to put the country code in the beginning.
So, what do you think guys might cause me problem? Thanks in advance For sure: 1) I am using GiffGaff mobile network provider, which operates on O2 operator. 2) I have connected 1 Gb data allowance + unlimited sms 3) I am in United Kingdom 4) I use Mac