It appears the problem was with the USB cable or the IDE for compiling. Reset PC / moved USB and the previous code worked.
This is the result of the SM;
Remember to to set Both NL & CR in the serial monitor.
Ready
AReceived String: T+GSªCC¡PÕ¥¨RÔ*¥¨HHÕÍå�‚¹ryj
AT vershow:1.2.0.0(Iuf 1 2016 20=04:45)
SDobT 21
AT
Received String:
OK
Received String: A
Received String: T+CIFSS
C¡¥¨RÔ**§*U%A±‚r‚r‚rƒe
+CIFSR:STASP(I²‚Ò‚ŠÒÊ¢Ò¢é2ÑÒŠ"‰j
OK
T+CIFSS
C¡¥¨RÔ**§*U%A±‚r‚r‚rƒe
+CIFSR:STASP(I²‚Ò‚ŠÒÊ¢Ò¢é2ÑÒŠ"‰j
OK
Will test the 2nd example.
The LED does come on with I do CIFSR and goes off when I do GMR