LTE-M Coverage in Ireland

We are using the NRF9151 and unable to establish a connection to an LTE-M network in Ireland (testing in Cork currently). We are using a Kore MVNO SIM which supports Three Ireland which to our understanding supports LTE-M. We have tested this in the NRF9151DK as well as the Onomondo and Wireless Logic SIMs that ship with the DK. With all of these options we weren't able to establish a connection.

Has anyone successfully connected an nRF91 to an LTE-M network in Ireland? Are there recommended SIMs / carriers for LTE-M?

Thanks!

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