AI-Thinker has released new product A6 GSM/GPRS Breakout for M2M application. For more documentation, you can download it from With AT command tester, developers can test AT commands, data call, voice call, SMS, network selection, FTP, phonebook, TCP-UDP, HTTP etc of all SIMCOM and other GSM/GPRS Module. AT command tester is a free online software tool that is used to test AT commands and other functionalities of GSM modems. The friendly user interface allows developers to: 1.Configure and connect to modem ports 2.Send single or batch of AT commands Perform modem diagnostics 3.Establish 3G or GPRS call 4.Collect and save modem logs For more info, you can read this tool documentation and download link at.