The Nokia 150 (model RM-1190) is a popular, budget-friendly feature phone released by HMD Global. It is widely used for its long battery life, physical keypad, and basic calling and texting functionalities.

Modifications usually require specialized "box" hardware or service software (like MTK Meta Mode tools) and a USB connection.

Operators can detect fake IMEIs, leading to your phone being blocked from all cellular networks.

: Relies on a secured NVRAM (Non-Volatile Random-Access Memory) partition to permanently store the device's 15-digit IMEI numbers.

The software communicates directly with the MediaTek boot ROM (BROM).

It backs up the existing security certificates ( Cert files) to ensure the device is not permanently bricked if the write cycle drops voltage.

There are several reasons someone might want to change or restore an IMEI:

Under the Mobile Telephones (Re-programming) Act 2002, it is illegal to change an IMEI or possess equipment to do so.

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A sequence that is sometimes used is: *#06# (to check your current IMEI) and * #0000 (to access the service menu, though this might not directly allow IMEI change)

Recent government actions highlight the strict stance authorities take. For example, the Department of Telecommunications (DoT) in India has issued public warnings, stating that tampering with an IMEI number is a violation of the Telecommunications Act, 2023. The penalties are severe, including . The law further clarifies that these offenses are considered "cognizable and non-bailable". Similarly, the Pakistan Telecommunication Authority (PTA) has been actively raiding markets and seizing devices with altered IMEIs, treating it as a threat to national security.

While these codes often work on clone or "China" versions of the device, they frequently do not work on original Nokia hardware Legal Warning: