Flash Tool v5.1420.0 remains a go-to software solution for flashing and repairing MediaTek (MTK) feature phones (keypad devices)
Step-by-step: Typical flashing workflow
Go to → select RAM Test and NAND/NOR Test . A failure in the NVRAM block often explains unresponsive keypads. If the test fails, go to the Format tab → choose Manual Format → enter NVRAM start address (look at scatter file) and format only that region. Then reflash the NVRAM partition from a backup. flash tool v5.1420.0 mtk keypad
