Project description, more information and ordering can be found at https://www.sparkfun.com/products/9607 Sample Sketch: http://dlnmh9ip6v2uc.cloudfront.net/datasheets/Cellular/Cellular_Shield_Passthrough_b.zip SM5100B Datasheet: http://www.sparkfun.com/datasheets/CellularShield/SM5100B%20Datasheet.pdf SM5100B Hardware Spec: http://dlnmh9ip6v2uc.cloudfront.net/datasheets/Cellular/SM5100B-D_HW_spec_V1.0.0.pdf SM5100B AT Command Set: http://www.sparkfun.com/datasheets/CellularShield/SM5100B%20AT%20Command%20Set.pdf SM5100B SMS App Note: http://www.sparkfun.com/datasheets/CellularShield/SM5100B%20SMS%20App%20Note.pdf SM5100B TCP/IP App Note: http://www.sparkfun.com/datasheets/CellularShield/SM5100B%20TCPIP%20App%20Note.pdf