I havenīt much experiences with android flashing.
I think, NVRAM is corrupted and a I have no backup. I tried to change my IMEI number, but it helped once only, but it broke up in a few hours.
I am searching for someone with same model - I need the NVRAM backup / radio firmware. Of course, I will change your IMEI numbers for my own.
I will be glad, if you write me some tutorial.
If it helped me, i will give you some thankful reward (about 10 USD, PayPal).