As an alternative to today’s GPS NB-IoT will offer three additional localization features:Cell ID, Enhanced Cell ID (E-Cell ID) and Triangulation (OTDOA).
Cell ID is the least accurate feature (but still appropriate for some use cases). E-Cell ID relies on UE-assisted and network-based methods. Triangulation is the most accurate. These localization features are already included in the new version of the NB-IoT specification (3GPP Rel. 14), but it is too early to say when they will be implemented by device/network vendors and network operators.