Hello there,

Just received my first brand new RBSXTLTE yesterday.

Helas, the device has managed to connect on LTE network only a couple
of time, and after about half an hour of PLMN search...
Most of the time I got :
[admin@LTE] /interface lte> info 0
status: PLMN search in progress
revision: chip:2.0 fw:0.1.2.3
imei: 356159060018466
imsi: 208015003463483
uicc: 15251168212960201504
rssi: -141dBm
rsrp: -150dBm
rsrq: -30dB
sinr: -20dB

"PLMN search in progress"...

I've tried two different sim cards, from two different operators,
changed the APNs, authentification methods and so on.
I've also tried the precedent RouterOS version, the current and
the release-candidate.

Of course both card work well in and Huawei USB stick connected to
my RB750, for instance.
I'm located in the center of Bordeaux/France.

Now I'm really lost :-/

TIA

have the same problem.

maybe try aiming the sxt lte toward isp tower because the sxt lte have a directional antenna

maybe try aiming the sxt lte toward isp tower because the sxt lte have a directional antenna

already done but the problem of instability!!!

rssi: -141dBm
rsrp: -150dBm
rsrq: -30dB
sinr: -20dB

It seems you have bad signal...to worse.
Below are explanations of these values (and also RSSI in relation to LTE):

SINR/SNR – The signal-to-noise ratio of the given signal.
RSRP – The average power received from a single Reference signal, and Its typical range is around -44dbm (good) to -140dbm(bad).
RSRQ – Indicates quality of the received signal, and its range is typically -19.5dB(bad) to -3dB (good).
RSSI – Represents the entire received power including the wanted power from the serving cell as well as all cochannel power and other sources of noise and it is related to the above parameters through the following formula:

RSRQ=N*(RSRP/RSSI)

Where N is the number of Resource Blocks of the E-UTRA carrier RSSI measurement bandwidth.