Is your old keypad phone showing "Invalid IMEI" or "Network Lock"? Discover the best free tools to repair IMEI numbers on feature phones (Nokia, Samsung, Micromax, QMobile). Step-by-step guide, safety tips, and legal advice.

In an era dominated by sleek touchscreens and powerful smartphones, the humble keypad mobile phone—often referred to as a "feature phone"—remains a vital tool for millions. Whether used as a durable backup, a dedicated device for the elderly, or a necessity in areas with limited electricity, these devices are workhorses. However, like any digital device, they are prone to software issues, the most critical of which is the loss or corruption of the IMEI number.