Please help me to find the way how to use the second SIM card in new IPHONE SE ? I didn’t find any space to fill into .
iPhone SE, iOS 13
Second Sim Card? Where did you buy this device from? Second Sim is eSIM not physical SIM
The iPhone doesn't use two physical SIM Card Slots (except in China).
There is one physical SIM card slot and one digital eSIM that you need to activate with your carrier.
See:
Using Dual SIM with an eSIM
https://support.apple.com/en-us/HT209044
my phone is not work
If you are from Bangladesh as per your profile, where did you get this iPhone SE (2nd Gen) from?
Do you have iPhone SE (1st Gen) then it only has one SIM.
In both case if your iPhone is locked on to a carrier then you will have to use a SIM only from the same carrier.
Double sim for IPHONE SE
