Now you have proper sinr :). I not see any question then consider this case as solved.
Type question if you have any.
Remeber to log & track parameters of LTE: http://forum.mikrotik.com/t/r11e-lte6-2ca-not-staying-connected/136004/22
You can do some own watchdog for safe you to not stuck in offline:
Simple watchdog: http://forum.mikrotik.com/t/sxt-lte-4g-cat6/134468/1
Advance watchdog: http://forum.mikrotik.com/t/tx-rx-fp-rx-dropped-pppoe-account/132656/1
and maybe consider to enable incomming SMS with execure few scripts who can rescue you 