How to write IMEI or fix null/invalid IMEI on a Mediatek (MTK) Android phone with Miracle Box

Pre-requisite abokitech.net/...
In this video, I have shown to write IMEI or fix null/invalid IMEI on a Mediatek (MTK) Android phone with Miracle Box. Phone must have a valid baseband before writing IMEI, if baseband is invalid you're required to fix my flashing stock ROM or secro.
See also how to fix unknown baseband with Miracle Box