@ShamieDoc THanks for your response. Band 1 on the M6400, Band 8 on the MR600. Band choice seems automatic rather something I can change - my router must not have had the new beta firmware installed....

HI folks. Would appreciate any advice. I use the Three network in Ireland for SIM broadband due to my rural location. I recently upgraded to 4G/LTE SIM plan but their Hwawei router gave a poor signal...