Here's how you can paste phone numbers from the clipboard on your iPhone.
1. Copy the phone number to the clipboard.
2. Go to the Phone app keypad.
3. Tap and hold the blue phone number section.
4. The paste option will appear, paste in your phone number.
This can be helpful if you need to make a phone call on your iPhone, and your number isn't in your contacts list.
Read more: iLounge