All you lost photo and photo Photo Stream are still on your iphone,you can recover you iphone photo with a iphone data recovery.

There are 2 methods to recover iPhone lost data:
1.Directly Recover from your iPhone lost data on Windows computer;
2.Recover Previous Data via Your Device’s iTunes Backup File on computer.

You can recover iphone lost data from computer,you can learning this use guide about how to recover iphone Calendar/SMS/Contact,it is so easy to recover you lost photo,video,contact,sms,call list,ect.

You can Recover iPhone Contacts, Messages,Photos,Videos, Camera Roll, Photo Stream, Photo Library, Message Attachments, Call History, Calendar, Notes, Voice Memos, Reminders and Safari Bookmarks.