My name is Andrei, i am a Romanian IOT Developer with a lot of experience in IOT projects and automatics .
I am using A6 module who is cheap and SIM800 - i can do your code in a short time .
I can work wLagi
I am mecatrionics system engineer I am expert in embedded system just as pic and Arduino and avr
I work with Arduino with all of it's versions from making line follower cars to drones and underwater vechicles I joineLagi
I have an almost ready solution for your task.
This is a module based on SIM800, which I will connect to my Arduino board. All I have to do is write the program code. This task will take me one or two daysLagi