Thanks for the prompt response Vytenis!!
We did NOT updated the firmware/configuration and the SIM is under contract, it cannot have reached a data limit.
I don't have the FMB630 with me, so won't be able to do what you suggest, but will do so as soon as we get it back. Unfortunately, it seems we cannot do anything remotely.
With regard to our sales manager, unfortunately I have to say that we have tried many times, and she does not respond to our emails at all and when she does , she always has to ask support and it takes forever to get a response. We have tried with other sales rep and distributors as well, and unfortunately we cannot seem to get any decent support. Therefore, am very excited about this forum and have great expectations to finally get our technical problems resolved.
I think Teltonika have great products but the sales team, at least for South America, is very unprofessional, they just want to make a quick sale, and are NOT looking to build a long term relationship with their clients (at least that has been our experience so far) .