"cellphone" shield?

How long are you waiting before sending the next SMS?

Anytime from after the message was received on my phone.
The sending process in the code takes about 8 seconds, delivery of the message to the phone normally takes about 3 seconds from the end of the loop.

It makes no difference if it is left sit for 1 min, 10 min or 10 hours, before the next 'Push'.

miloSA

I cannot tell you why, just yet, but I found that if I use a 32K sim card instead of a 64K sim card, all works properly.

No idea about this one.
The only SIM's I have here in OZ are the Telstra Next G 128k USIMs.

miloSA, what do you mean by "all works properly", what behaviour did you experience?

If you have it working can you post a work code example please.

MH