imei problem in symphony xplorer w69q

Hello,
I have ran into a problem. I am using Symphony Xplorer W69Q and I was looking for a custom ROM. I was liking mostly MIUI. So I have contacted them and asked if there has any Custom ROM for my device. They told me that there has not any ROM for my device. So I have searched on google for any other custom rom and get one of MIUI 7-

So I have decided to make a try.

One I have collected Philz touch recovery and flashed the ROM, I have lost my IMEI. I didn't take a backup of my current ROM too. Finally I have no way to get SIM card working as they are no longer being detected.

I think I made the mistake by wiping the cache and also dalvik cache as per their silly instruction. I have installed the ROM successfully and there have not any other bug except the SIM card/IMEI error.

When I press *#06#, I get-
IMEI1- Invalid
IMEI2- Invalid.

Then I flashed the following Stock ROM using SP Flash Tool

(Symphony_W69Q_1_FL_V03.0_V1.0)

But still I can't get RID of the Invalid IMEI problem.
I also tried to use the SN writer tool. But I couldn't find the database file listed here
androidmtk[dot]com/use-sn-write-tool
(I couldn't get any file of MDI_DB and AP_DB in my stock ROM)

Also tried this tutorial
on Youtube-
Android phone invalid imei repair
by Azeem Md

But it not also worked for me. I couldn't find the database file for my Phone.

So I am still stacked on Invalid IMEI problem. I also tried Chamelephon.apk and Engineering mode in MIUI 7. But there the CDC Information can't be selected because it is grey there.
So is my phone dead now????.

Please anyone help me by providing me a working solution with necessary file download link.

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