UPDATE:

I went to MVD and inform them about this call and they verified that it was really FSB.

I went to FSB, everything went smoothly. It was not that bad, yes the interview took about 2.5 hours. They asked various questions. I can't say it.

After that they say good. Returned my phone and documents and said bye.
That's all. Thank you all for your comments.

I am also reading many of you commenting that they will send me to front line.

I am still an INDIAN, even my own country can't send me on front line without my own will. Secondly If I have interest for army (which i clearly does not have) however If i had ( in parallel universe) I would first choose my own country.

So calm down guys.

Hello

I'm Indian living in Russia, having a Russian wife, and also have RVP already living in Russia for 2 years, yesterday suddenly I got call from FSB Russia, they asked me I got my RVP and want to talk with me so they ask me what time it'll be convenient for me to meet?

I'm little afraid, should I worried?

I'm working remotely, and never indulge in any bad thing or literally anything in Russia, just living here with my wife.

Kindly if someone has anything to suggest before meeting with them tell me please.

Edit : we already confirmed with the main City FSB office, it's indeed a genuine call.