This click and shield combo is an easy replacement for Arduino's original GSM shield because (1) it's compatible with the stock Arduino library and (2) we'll ship the GSM2 click set up for a 5V logic level (by soldering the onboard jumper to the appropriate position)
You have Jason from Ireland to thank for this one. Jason drew our attention to a discussion on the official Arduino forums where people were lamenting over the disappearance of the original Arduino GSM shield from all online stores. He had the same problem himself until he found gsm2 click through Google.
Jason's example bypasses Arduino Uno click shield for now (because it's based on an Arduino library that uses different pins). However, in the description of the example Jason announced he will publish a click shield compatible example soon. So the GSM2 click + Arduino Uno click shield bundle is still a good deal!
GSM2 click is the simplest way to add GSM/GPRS communication layer to your project, for fast transmission of data, voice, and SMS. It features the Quectel quad-band M95 FA GSM/GPRS module. GSM2 click is designed to run on either 3.3V or 5V power supply and communicates with the target MCU over UART and the following pins on the mikroBUS™ line: INT, PWM,...
Arduino Uno click shield is an extension for Arduino Uno and any other Arduino-compatible board. It's a simple shield with two mikroBUS host sockets that allow you to connect more than 75 different types of click boards to the Arduino.