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Can we identify the operator / operator for an Android device that has been deleted?

For a GSM Android device whose SIM card has been removed, is there a way to determine which media was previously launched or possibly sold? I am most worried about finding phones that have the same Build.Device and are sold by several different carriers.

Most carrier / carrier detection methods seem to depend on whether it is currently connected to the network or if a SIM card is present.

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Check the line Build.FINGERPRINT . It may not be 100% reliable, but most carriers put their name in the first section of the line: $(PRODUCT_BRAND) .

http://developer.android.com/reference/android/os/Build.html

The FINGERPRINT format is as follows:

$(PRODUCT_BRAND)/$(PRODUCT_NAME)/$(PRODUCT_DEVICE)/$(TARGET_BOOTLOADER_BOARD_NAME):$(PLATFORM_VERSION)/$(BUILD_ID)/$(BUILD_NUMBER):$(TARGET_BUILD_VARIANT)/$(BUILD_VERSION_TAGS)

Of these, $(BUILD_ID) specific to the carrier / assembly / area.

Of course, none of this will work on non-marshalled devices or on devices with custom ROMs , since they are not tied to any carrier without a sim. For these two cases, I believe that there is no way to determine anything other than checking the sim, simply because there is nothing to check.

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