Many tools only require the first 14 digits of the IMEI; they automatically calculate the 15th check digit using the Luhn algorithm to ensure validity.
Most versions can write two separate IMEI numbers simultaneously for dual-SIM devices. mtk imei v30 full
Some newer tools, such as the Aftersales Tool , can perform repairs in "Meta" or "Factory" mode without needing to root the device or unlock the bootloader. Many tools only require the first 14 digits