T-Mobile USA has announced that an NB-IoT asset tracking service is now available on its 4G network. Using Roambee’s BeeAware devices, the cost starts at $10 per month per device, or at $120 annually, which is still a long way away from the pricing envisioned by the most enthusiastic low power WAN (LPWAN) advocates. This is a bundled service that includes the Roambee devices themselves and the data processing to support them, as well as a portal to monitor the assets and an application programming interface (API) to tie in with cloud applications. The costs still seem high for an IoT application, with limited bandwidth and data requirement. And there are question marks over this type of application. Wireless Watch’s…