Hackrf one 2G SMS base station research and teaching

I'm conducting research on a 2G SMS base station,I need someone who really understands hackrf one, knows how to debug and build it, and knows how to set it up. Understand that the switching circuit provides specific time slots for TX and Rx.
I hope you are not a robot or an automatic bidder. If you are a robot bidder, I will definitely report you. I hope you will give me a reasonable price. I sincerely want to find someone to cooperate. Novices and scammers should not come here!