Mikrotik not working with sim card?

Question

Mikrotik

Good day.
I ran into such a problem: periodically Mikrotik (SXT LTE or wap R) stop seeing the SIM card, in the Registration status: denied interface status , only replacing the SIM card helps.
Simcards worked from several months to several days, the operator with whom this happened was a beeline. Simcards are not in the home region, they did not download large volumes, within a couple of hundred megabytes per day (surfing, but mostly mail). What is it? Ban operator?

Answer 1

Try the SIM card in your phone after it stops working in Mikrotik. I do not really believe that Mikrotik spoils sims, but there is a non-zero probability. Also, try not an ordinary SIM card with a mobile communication tariff, but a special one - with a router tariff, because. opsos are smart enough to ban users who come out with one sim card from several computers.
Well, and if you have not violated the terms of service, then you can always contact the OpSosa SC and clarify what is happening.

Answer 2

Only SIM change helps.

is the replacement a reissue or another sim card with a different number?