Tata Consultancy Services Mainframe Developer interview questions

Good interview and very good client round. But need to know citi work culture. Need some suggestions on which project to join. Tcs has many clients but confused to know which is better.

I cleared all the technical rounds and had 1 min exact 1min call with HR where she just took my ID pics and said she will connect back. After that had 1.5 months of silence and suddenly one day got offer letter (no salary discussion, no connect, out of the blue offer letter). To my surprise, the package was same as what I was getting in my current comapny minus the perks too, as if they had not even seen my profile.