Closing old cc will impact my cibil ?

Hello Guys,

Right now I'm using 4 CC
1) Flipkart Axis 36months old [Joining ~500 ]
2) HDFC millennia 36months old [Joining ~1k]
3) SBI Cash back 32months old [Joining ~1k]
4) ICICI Sapphiro 18months old [LTF]

from past 2 year all these cards got devaluated.
I wanna upgrade my cc wallet like 1 premium card + 3dummy card [with less annual fee]
So I checked the best cards from Axis, HDFC& ICICI, after the comparision between Axis atlas,ICICI Emerald normal [eligibiled] & need to check from HDFC which

Please let me know if any suggestions
I decided to go with Axis atlas based on Joining vs reward structure compared to ICICI Emerald

I don't wanna increase the count of my cc
So,
1) Can I upgarde from Flipkart Axis to Axis atlas ?
if this doesn't work shall I close Flipkart Axis and then apply for Axis atlas? will it impact on credit score ?
2) Will they allow to downgrade the HDFC millennia to some basic cc which doesn't have any annual fee but should work on flipkart and amazon sales ?

My monthly exp will be 50k to 1L

1. If you upgrade, it doesnt impact your credit history. Closing the older account will change your credit history to the next oldest account and hence impace score.
2. In your case, ask Axis to give Atlas(if you travel more) or Airtel/Ace/Horizon (check your use case) by UPGRADING your account.
3. Even if you close Flipkart and Millenia, your SBI Cashback is almost equally old. So it shouldn't impact much.
4. From Millenia, you can move to Regalia gold if you want to continue building your case for Infinia. If not, you can take Pixel card which is LTF right now.
5. ICICI Bank saphiro should become your oldest card eventually or any LTF card.