I recently flashed my Lenovo vibe x2 AP phone so I lost my IMEI so I used MauiMETA to put my imei on my phone when I turnedphone no SIM card?

Just simply flashing this phone would not erase the IMEI, and even using MauiMETA doing this on a MediaTEK based device is not a guarentee that you can change it. For some reason you've attempted to change the IMEI and you now have a phone that won't work. What are we supposed to think about this. For what it's worth you now have an ex-phone. If you know exactly what you've done you may be able to restore it to it's former self, or you may not.