How can I pay someone by using UPI number?

That's easy.
1. Login to Tata Neu app
2. Click on ‘Send money’ on Tata Neu home page or
Click on ‘Send money’ on Tata Pay home page
3. Type in the UPI number
4. Click on ‘Verify’
5. Follow the steps you see to pay the same UPI number on Tata Pay UPI (if the UPI number is valid)
You can also tap on a contact to proceed with the payment on Tata Pay UPI if the contact is available on UPI Mapper.