Serial numbers and specific regional hardware configurations. Common Reasons for Editing NVRAM
Editing or changing an IMEI to a number other than the one originally assigned to the device is illegal in many jurisdictions. Always use the original IMEI found on your device's box or under the battery. mtk nvram editor
Zeroing these bytes turns a carrier-locked phone into a universal device. But newer MTK chips (Dimensity 9000+) store this in an RPMB (Replay Protected Memory Block) secured by a per-device key — making the editor useless for that partition. Serial numbers and specific regional hardware configurations