Two methods can help you to recover lost data on iPhone .

One. Recover deleted data from iPhone yourself via iTune:
1. Connect your phone with iTune on computer
2. Right-click or control-click on the iPhone icon under iDevice on iTunes
3. Select "Restore from Backup" from the given options
4. After it finishs, your histories are back to your iPhone

Important Note: This works only if you have made a backup for your chat history on iTunes.

Two. Restore contacts,messages,photos,videos,ect from iPhone by using third party iOS data recovery for Mac

If you have no backup for your chat history you can download iPhone data recovery software in order to overcome the problem and restore iPhone chat history loss. Still you have not recovered lost whatsapp chat history from iPhone, some on-line applications also available which can be helpful in restoring precious contents details, probably will be able to find the solution to some extent.

With the help of iPhone Data Recovery you can also do the following:
* Get lost data back from iPhone automatically within a few minutes
* Retrieve all lost or deleted WhatsApp Chat History, SMS messages, pictures, notes, etc. from iPhone.
*Recover contacts from iPhone directly without backup
* No need of manual configuration or specific technology and skill
*Restore messages from iPhone directly
*Recover iPhone lost photos

Two methods can help you to recover lost data on iPhone .

One. Recover deleted data from iPhone yourself via iTune:
1. Connect your phone with iTune on computer
2. Right-click or control-click on the iPhone icon under iDevice on iTunes
3. Select "Restore from Backup" from the given options
4. After it finishs, your histories are back to your iPhone

Important Note: This works only if you have made a backup for your chat history on iTunes.

Two. Restore contacts,messages,photos,videos,ect from iPhone by using third party iOS data recovery for Mac

If you have no backup for your chat history you can download iPhone data recovery software in order to overcome the problem and restore iPhone chat history loss. Still you have not recovered lost whatsapp chat history from iPhone, some on-line applications also available which can be helpful in restoring precious contents details, probably will be able to find the solution to some extent.

With the help of iPhone Data Recovery you can also do the following:
* Get lost data back from iPhone automatically within a few minutes
* Retrieve all lost or deleted WhatsApp Chat History, SMS messages, pictures, notes, etc. from iPhone.
*Recover contacts from iPhone directly without backup
* No need of manual configuration or specific technology and skill
*Restore messages from iPhone directly
*Recover iPhone lost photos