RT: 3G was a primary connectivity layer for IoT devices…
Most major US telcos are shutting down their 3G networks this year or next…
I wonder where all those IoT devices looking for low-cost connectivity will go? 🤔 @helium https://twitter.com/mikeddano/...
转发：3G是物联网设备的主要连接层…
大多数美国主要电信公司都将在今年或明年关闭3G网络…
我想知道那些寻求低成本连接的物联网设备会去哪里？🤔 @氦https://twitter.com/mikeddano/...