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.

iPhone 6 Data Recovery is a powerful recovery tool which enables you to recover deleted or lost data files from iPhone directly or extract to recover from iTunes /iCloud backup file easily and quickly. It’s the world’s 1st data recovery software for iOS users to recover lost data including Contacts, SMS, Photo, Video, Notes, Call history and more from iPhone, iPad & iPod touch.
You can recover deleted contacts from iPhone, all you need is a data recovery for iPhone data recovery,on the market, few data recovery software supports recover contacts from ios iPhone 6 .Now,I recommend you a professional data recovery,which supports restore contacts from iPhone 6.
If you fail to get your lost pictures directly from your iPhone, or your iPhone type is 5S/5C/5/4S, you can extract the iTunes backup. But before this, what you need to do is that synce your iPhone with iTunes before you lost those pictures.

Step 1 Choose and Extract the iTunes Backup

Choose “Recover from iTunes Backup File” option, when launching the program on your computer. Then, you’ll get the interface below. Choose the latest iTunes backup of your iPhone, and click “Start Scan”.
Step 2 Preview and Recover your iPhone Photos

Being scanned, all founded data are in order. After scanning, you should preview carefully to choose those you want and click “Recover” button to save them on your PC.
see more:
Recover Deleted SMS from iPhone 6
Recover Lost Data from iPhone
Recover lost contact from iPhone 6
recover deleted SMS messages from iPhone 6/5/4S/4/3GS?

 

Recover contacts from iPhone with iPhone Data Recovery
If you just don't have any backup to restore, you may need to use a piece of paid software torecover lost iPhone data such as text message, contacts, photos, music, call logs, etc. Below I will tell you how to use iPhone Data Recovery to recover lost contacts from iPhone 6 without iCloud or iTunes backup.
Step 1: Conncet your iPhone with Computer
Step 2: Scan your iPhone files: contacts, photos, music, text messages, call history, notes and so on.
Step 3: Preview and recover contacts from iPhone.

 

Actually,you still have chance to recover lost contacts,text messages, photos, videos and other data from Samsung mobile phone.
As you know, the reason why a professional Samsung Data Recovery software can help you recover deleted Samsung files is that your lost data are still stored in somewhere of your phone, but if you add new data on your device, the new data may overwrite those previous data, then you will never get them back again.To restore Samsung lost data,you can read the use guide:
How to recover Samsung lost contacts
How to recover deleted SMS from Samsung

Read more from: http://restore-samsung-contacts.blogspot.com

 

If you own an iPhone and one day it stuck in recovery mode, you can use the Tenorshare ReiBoot to fix it. It is a professional free tool to help you enter or exit recovery mode of iOS devices, including iPhone, iPad or iPod. So as the best iPhone recovery mode software for Windows, you can use it to fix your iPhone. See more at this homepage->>

 

When you delete some contacts or other data from iPhone by mistake, what you need is to stop operating your iPhone and back up iPhone with iTunes or iCloud just in case of deleted data being overwritten by new added data, then you can use a iPhone recovery app to scan your phone to get data back without backup files.
how to retrieve lost contacts on iPhone
how to retrieve deleted messages on iPhone

 

You need to use iPhone Data Recovery. It can scan your iPhone deeply to find the deleted and lost contacts for you. You can preview them before recovering. Learn how to restore contacts from iPhone. Besides contacts, you can also recover messages, photos, videos, call history, notes, reminders, calendars, voice memos, voicemail, safari bookmarks and other deleted data from iPhone.