Hi there,
I am looking for a SMS proximity machine that is able to send SMS to anyone within a 1km-2km radius without any usage of SIM cards or recipient's phone number.
It is also called a Pseudo Base Station.
Its chinese name is 伪基站 / 免费手机短信群发器
I have pictures attached to the email, with the specifications.
Please check and let me know if you are able to source this for me.