You need to download and register for UPI on Freecharge on the new device.
Related Question
What is a UPI ID?
How will I know whether the unique ID (UPI ID) provided by the receiver is corre...
Who can use UPI on Freecharge?
What is Freecharge UPI?
What can be a UPI ID?
Does the UPI ID necessarily have to end with @freecharge?
What can you do using Freecharge UPI?
Are there any charges to use UPI on Freecharge?
What if someone has already created a UPI ID using my name?
Is UPI available on Freecharge app on iOS, Windows and Blackberry smartphones?
What if I change my mobile handset and want to use Freecharge UPI on the new device with the same number?
You need to download and register for UPI on Freecharge on the new device.