You're right, it is not possible with the elements I have, to highlight a bug in avast anti-theft.
From +/- the same place, my thief has placed three different SIM cards. There were perhaps sometimes no SIM card present and only an internet connection via WIFI.
My problem is now that
- It is difficult to know exactly when a SIM card is present in the phone.
- Until now, all sim cards were prepaid cards. The police have difficulties to formally identify the owner of the cards
- Control of the GSM via the portal is not possible (google cloud messaging stays disabled on the phone).
- All connections to the avast server are via WIFI (no mobile internet with the sim cards)
- With the GPS coordinates, I can see that the phone is located in a building with many apartments.
Perhaps should it be usefull in such a case to have, as complementary elements, information like
- source IP address of the messages received by the avast server,
- MAC address and name of the WIFI router, ..
best regards
marc