WHATS APP::Change Your Mobile Number on WhatsApp without losing any chat history.

Do you want to change your SIM Card and then continue with the same Phone there is no need to uninstall and reinstall Whats App to change Whats App number.

There is a default option available on Whats App to change mobile numbers. For that go to Settings then Account and Change number. Enter both old and new phone numbers and click Done.
Now you already verify your new number all the Groups, messages will be migrated to your new Phone number.