We made an imlet (java programmed) that is controlled by sms and sends sms's.
However the sending/receiving of messages works well we have suddenly a problem.
The device (teltonica T-Box12) now refuses to send sms's when the power has been off. Then suddenly after many hours it starts sending sms's again, after this has occured we can change imlets restart the module. But once the power has gone off that very same imlet has to wait hours and hours before it can send or receive messages. The configurator shows that there is a decent antenna reception.