How can I shutdown the software of my stolen phone
I think there are settings in Android, but you had to set it up before it was stolen.
You should tell your SIM provider network that the phone was stolen and they will block the SIM. If you also know the IMEI then tell them and they should also be able to block that, meaning that the phone won't be able to connect to any network again (so long as other networks respect the block).
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