spatula:
A couple of questions out of personal curiosity: is there a reason for coding all these gsmSerial.print() instead of using some of the library functions (e.g. gsmSerial.sendTxt())? How did you address the problem of logical level conversion between 2.65V CMOS levels on the GSM side and 5V TTL levels on the Arduino side?
Oh $#!t, never realisied that it was 2.65V, i've been bit banging it with the 5v arduino (so far no problems!). It is on a sainsmart TC35 shield and any diagrams to hook it up show direct connection of the TX, RX & GND??.
I am only using the SoftwareSerial library but will definitely be investigating the GSMserial library. (and the delays). thank you spatula