Dear Hari,

I have heard 2 different stories in this case. Probably it shd favour you.

Since your permit is expiring, changing employment shd not be a problem. On the contrary, the labour authorities told me sometime back that for changing jobs with this permit you would need agreement from your current employer. Not sure which one is correct. But I had a friend who was able to switch with this type of permit without an agreement from the current employer.

But I reckon it is not a open B, so please check with the Arbeitsamt(work office) and confirm us your good news.