Here are a few options for a helpful review, depending on where you are posting (e.g., a forum, a software download site, or a tutorial page).

Unlike modern smartphones (which have the IMEI stored in secured, one-time programmable memory), the Nokia 1208 stores its IMEI in a writable area of its flash memory.

Let’s answer the core question:

Technically, an IMEI is a permanent identifier assigned at the factory. For devices like the Nokia 1208