Shortest path to implement NB IoT solution with WP7700

Hi
I am just getting familiar with NB-IoT. We have IoT products with LoRa connectivity option. And now we want to provide NB connectivity option also. Can someone please help me get started on this?

  1. I would like to use a NB-IoT module which is global type (any band) and expect to connect to the module by USART i.e. Tx+Rx+Wakeup line / module enable line. I only plan to send/receive data over NB network.
  2. There are a few modules available in market, is there any comparison someone already did as to features and cost? since I will need large number of modules
    Thanks