Image extracted using Cellebrite 'Universal Forensic Extraction Device' (UFED) may not contain a valid partition table, so the image isn't usable with other Forensics tools.

Note that data is encrypted by default on iPhone 4, so you need to decrypt the data first: Fixing the partition table from image extracted using UFED

Follow PhotoRec Step By Step guide if needed.

Once the copy is finished, on your computer, run photorec iphone.img.

If you're really good, you can make your own progress bar, since the numbers are all there.

For awesome points, wrap that call in a watch loop. Then send the USR1 signal to the dd process (kill -USR1 `pgrep dd), and it will print to stderr. If you want an indication of progress (dd statistics), put the job in background (Ctrl-Z, bg).It can take a few hours, so be patient.Don't confuse dd if= with dd of=, otherwise you may overwrite your iPhone memory.This command is case sensitive, don't get it wrong.Replace username by the user account on your computer and computer_IP by the IP address of your computer.Run dd if=/dev/rdisk0 bs=4096 | ssh -C 'dd of=iphone.img'.Turn off autolock on your iPhone: Settings > General > Auto-Lock > and select 'Never'.The 'DD' utility installed on your computer (Pre-installed on most Linux systems).An SSH server installed on your computer (Standard on Linux and MacOS X).Terminal (or MobileTerminal) installed on your iPhone.BSD Subsystem and OpenSSH installed on your iPhone.Warning: Jailbreaking, according to Apple, voids Apple's warranty on the device. If you have lost your data (pictures, contacts.) from your Iphone, it's still possible to recover them.

Iphone recovery mode data retrieval