Hello,
I am a hardware design engineer and I want to design a tiny communication device for hobby electronics and I want to sell these devices all over the world on Amazon. And for this, I researched GSM technologies and learned that each GSM technology is different and that they do not work all over the world. The US uses TDD and Europe uses FDD. That's why I wanted to ask. Do you have any module recommendations for me?
I am a hardware design engineer and I want to design a tiny communication device for hobby electronics and I want to sell these devices all over the world on Amazon. And for this, I researched GSM technologies and learned that each GSM technology is different and that they do not work all over the world. The US uses TDD and Europe uses FDD. That's why I wanted to ask. Do you have any module recommendations for me?