, making it nearly impossible to change permanently through a simple dialer code. "Codes" vs. "Masking":

: Changing an IMEI is frequently associated with bypassing blacklists for stolen devices. Most cellular networks can detect IMEI tampering and may permanently block the device.

Some older MTK-based Nokia models had secret engineering modes that could rewrite the IMEI using specialized software (like AT commands via USB or flashing tools). However, exists for the X1-01 to instantly change the IMEI without external tools. Any website claiming *#*#xxxx#*#* works is likely fake or malicious.