i have SXT LTE Kit, and on band3 with MTU 1480. but for my LTE interface MTU is 1200.
and -105 RSRP is really bad, you are on the cell Edge..
with band3 you should place your device with direct visibility to tower to improve signal.
you just need to hit Downgrade button on System/packagesunfortunately my MT is not upgrading to 6.44 from 6.43.12.
i am using the upgrade tool from winbox. downloading and reboot but it does not change at all...
pls. advise .. using RB952Ui-5ac2nD..