Switching from 2G to NB-IoT

Using Arduino Networking, Protocols, and Devices
1

Hello,

I have a few, battery powered remote devices which upload daily data to an FTP server through 2G network (Eastern Europe).
I was wondering if the same FTP connection could be possible using an NB-IoT module?
It would be nice to be able to run these devices from only one Lithium cell (2G modules are power hungry, they require at least 2 cells in series).

Could you recommend a low power NB-IoT module, which can be operated from one lithium cell?
As upload is done once a day, some kind of sleep mode would be necessary for modem/module to achieve very low power consumption during the day.

Thanks in advance.

2

Following this. I cannot find widely supported, cheap (< 20 USD) modules that do this work.