If you ever need to edit the prefix of your contacts telephone numbers.
How to use:
Just search for the prefix you want to change...
You will receive a list of numbers.
Then click on the update to Replace it with the new number you need.
Please see the video on how the app works.

Extra Feature
If you don't want to change a particular number in the List. You can remove it, before you click on an Update button!

IMPORTANT
As always, first a List of numbers, that can be changed is displayed to you.
The app doesn't update any numbers unless you click on Update 100 ... or... Update 300. Because different phones might fail to update all numbers in one single click... We have broken the update up into 100/300 contacts for safety.

Disclaimer
You have to take a back up of your contacts by yourself before you attempt anything. The developer cannot be held responsible for failures of different systems/states of your mobile phone. This is your responsibility.