In this article it is described what actions can be taken when a SIM card is inserted in the Ewon Netbiter but it does not detect it.
Ewon Netbiter EC320 / Ewon Netbiter EC350 / Ewon Netbiter EC360
I have inserted a SIM card but my Ewon Netbiter will not detect it, what could be the problem?
Make sure that the SIM card is properly inserted and oriented according to the print on the casing.
The SIM card must be inserted before the Netbiter is powered on. Inserting or removing SIM cards while the Netbiter is powered on may damage the SIM card.