Any suggestions on android data recovery ??
The device is not rooted and there weren't any backups.
I have already tested different paid (cracked) software on another device for testing purpose but none of them work.
Send Help!!

What's happened to it?

@ScriptCoded accidently deleted important data. Actually it's my dads phone.

I've made a guide for raw data extraction and recovery from Android. I'll let you know if I find it. Just remember not to use the device so that the data won't be overwritten.

Before you try any apps I suggest you to stop using phone to increase success rate of recovery (data maybe overwriten by any other app). There is many recovery programs (for windows) that tries to recover data. But all of them roots your phone first, recovers data, then unroots your phone. So they maybe void your warranty. Most of them lets you scan data but when it comes to recovery they will ask for a license. So don't waste time with free trial editions.

@hack @joas I'm aware of data overwriting and device is currently used for minor purposes (calls and messages only ).

@hack And I'm not using any kind of free stupid trial version third party softwares. I know they won't help.
Instead i tried the paid versions of two or three softwares ( Tested on another phone ) and they didn't recovered any data, actually they did recovered the things that were never deleted :)

@RantSomeWhere Actually there aren't any such companies near me, there are some local mobile repairers or such shops but none of them knows anything about this.
Firstly i thought there would be plenty of such useful softwares and it would be more easy to recover but it turns out i was wrong.