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1  Using Arduino / Networking, Protocols, and Devices / Re: SM5100B Cellular Shield Troubleshooting on: January 26, 2013, 03:10:20 pm
I have the same SM5100B shield + software using SoftwareSerial class.
I noticed when module receives a SMS, it stops working in case the ambient temperature drops under 2 Celsius.
At the normal temperature (23 Celsius) it works OK.
I think the problem is the power supply (it is under-dimensionated). I read somewhere that SM5100B takes 3A at full peaks.
In my opinion the power supply must be above 2 Amp. Try one with 2.5A or 3A.
2  Topics / Home Automation and Networked Objects / Re: Control Arduino via SMS without SHIELD GSM on: January 06, 2013, 11:07:51 am
I know  Nokia 5070 has Symbian S40 ver2, so you can do your project with AT commands (like AT+CMGR... ).
3  Using Arduino / Programming Questions / Re: GSM SHield Help on: November 03, 2012, 03:51:22 pm
I think you already solved the problem...but if not..
The problem is with line 45. You should remove it.

44: cell.write((byte)26); //ASCII equivalent of Ctrl-Z, tell the gsm module we finished the message transmission

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