How do I get my Galaxy S3 that is stuck in factory mode with an invalid IMEI, out of it?

A

AC Question

Galaxy S3 stuck in factory mode and has invaild IMEI

Hi, I have a GT-I1900. It was running version 4.3, but I read that I had to downgrade to be able to unlock it so I flashed it with version 4.1.2 and then rooted it, both using Odin.

However, this process has messed with my efs files and my phone now has an invalid IMEI as well as being stuck in factory mode. I didn't back the files up before I rooted and I've tried a number of different procedures and commands in Terminal but nothing has given me a permanent resolution.

Any ideas?
 

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