TECHSHIP IS A GLOBAL SUPPLIER OF WIRELESS COMPONENTS
Document summarizing and describing the GPS systems epoch roll over dates in Simcom products GPS trackers and how to take precaution for it.
This manual gives general guidelines worth considering when designing and selecting main and diversity antennas for cellular applications.
AT Commands manual for SIMCOM SIM7100 series cellular modules
This PDF document describes the Audio Application for SIM7X00 series modules.