Repeatedly wiping data from stock recovery (especially after a failed OTA) can corrupt the persist partition. Perform resets from Settings > System > Reset options instead.
The Nokia Care Suite is a software tool provided by Nokia for authorized service providers and repair centers. However, you can also use it to repair your device's IMEI number. Here's how: nokia 1.4 imei repair
This is the most reliable free method for MediaTek-based phones like the Nokia 1.4 (which uses the MediaTek MT6762 Helio P22 chipset). Repeatedly wiping data from stock recovery (especially after