Do you use LTE-M? Or NB-IoT? Both is not really intended for “much more data” and “faster speeds”. I consider LTE-M somehow as “medium performant”, and NB-IoT as “low performant”. These technologies are introduced for energy and cost sensitive applications. If you need “more data and speed”, you will need to use an other cellular standard (other modem), which then comes also with higher energy consumption and costs.
