i need copy of AT commands for siemensc35

"But remember that it isn't just professionals who ask questions on this board, as should be obvious from some of the posts. Most students and home-designers often specifically want to use a normal phone and not a module for their projects."

Quite so - which is why the post I cited also says,
"Having said that, there are plenty of examples on the web of using Nokia phones"

"But remember that it isn't just professionals who ask questions on this board, as should be obvious from some of the posts. Most students and home-designers often specifically want to use a normal phone and not a module for their projects."

Quite so - which is why the post I cited also says,
"Having said that, there are plenty of examples on the web of using Nokia phones"

"The main problem with using a normal phone, is that there is no easy way to turn them on/off"

Yes, that's true - but I wouldn't say it's the main problem.

I think that the main problem with using a phone is that the interface is likely to be undocumented and unsupported - they are sold, supported and documnted for consumer use as telephones.

So, if you do want to use a phone, you must be prepared to put in the effort to "reverse engineer" it. The phone may be "free", but this is the "hidden" cost!

A GSM modem or module, on the other hand, is specifically designed for this type of application - with appropriate interfaces, documentation and support.

Used GSM modems are fequently available quite cheaply on ebay.