This is a old Arduino 3G module bought half years ago.
Its wiki:
Http://wiki.iteadstudio.com/ITEAD_3G_Shield
Its mall:
Http://imall.itead.cc/itead-3g-shield.html
Datasheet for Itead 3G Shield Http://pan.baidu.com/s/1ntCH4UH
Schematic for Itead 3G Shield http://pan.baidu.com/s/1pJ5lRzt
Demo Code for Itead 3G Shield http://pan.baidu.com/s/1gdyaCYf
Its back where you insert a SIM card:
This board uses at commands to control itself.
Key:at commands
What's AT commands?
For Chinese readers:http://baike.baidu.com/view/2420376.htm
For 中文版 Readers:https://en.wikipedia.org/wiki/motorola_phone_at_commands (this is very helpful)
The AT Commands manual those is compatible for this board can is found here.
Http://wiki.iteadstudio.com/images/2/20/SIM5215J_SIM5216J_AT_Command_Manual_V1.02.pdf (you don't need to being an expert )
It looks the manual is a long enough to make you sleepy. :P Just Check the exquisite down below.
But as you can see, the download link does not exist anymore. But after googling a bit, there is some alternatives for your download the goodies.
Ds_im121026002_3g_shield.pdf:
You can find helpful tutorials from Arduino offcial Forum:
http://forum.arduino.cc/index.php?topic=140526.0
And the problem was solved. You can use the that scope of codes.
Arduino 3g Shield using GSM bought from Itead