If you have changed phone number but held the same mobile phone. Normaly people think of uninstall and then reinstall but by doing this you lose your data. Well i have got a solution for you. There is a setting inside WhatsApp that can let you to move your WhatsApp account to a different mobile phone number. So just follow the steps below
Change Your Whatsapp Number Without Losing Your Data
1. Open your whatsapp.
2. Go to Settings by clicking on menu then setting list appears just click on Account.
3. Now account menu appears then click Change number.
4. A new window appears just click next which is on the upper right corner.
5. It will ask you to enter you old and new both numbers. So put your old whatsapp number in first blank and new whatsapp number in second blank then click Done.
6. Validate your new mobile phone number and all your chat history and groups are going to be migrated to the new mobile number.
That’s it you are done hope you liked Just follow my blog for more tricks.