Google Pixel Change Imei |link|

If you bought a used phone online (from eBay, Facebook Marketplace, etc.) and it refuses to connect to any network, the device might be blacklisted because the previous owner reported it lost, stolen, or left an unpaid bill balance.

If your phone was blacklisted due to an unpaid bill or being stolen, you must pay the balance with the carrier or file a police report to have the IMEI removed from the database. google pixel change imei

a corrupted IMEI (often showing as "0000") after software updates or hardware glitches. Legality and Risks If you bought a used phone online (from