This GPRS/GSM Shield based on the SIMcomm SIM800F Quad-band 850/900/1800/1900MHz module that delivers GSM/GPRS 850/900/1800/1900MHz performance for voice, SMS, Data, and Fax in a small form factor and with low power consumption, it is the absolutely substitute/upgrade version of the SIM900 module, with the same AT Commands for controlling and upgrade signal performance.
Based on those Maduino solutions, Makerfabs can also help to customize those boards with customer’s special requests. Contact sales@makerfabs.com for detailed info and further discussion.
More detail, you can read our PCB Design and PCBA Turnkey Solution.