Free manuals first iphone using data and don't know why

If you want to recover data from a locked iPhone, feel free to read the following tutorial. It introduces a 3rd party tool that helps you recover lost photos from iTunes or iCloud backup.
Forgot iPad Screen Lock Password How to Recover Data from Locked iPad

Unfortunately the chances are its suffered from moisture damage.... Apple will have to fix it, its unlikely you'll be able to go to a 3rd party store, or they may not do it correctly. I have a suggestion though. Shut it off. Don't turn it back on. Leave it in a hot press for 72 hours. That'll let it dry out fully. Then fully charge and turn on. If that doesn't work its probably fried. After something suffers moisture damage you shouldn't turn it on until its fully dried out or it gets worse. Sorry man.

Firstly you have to plug your iPad into Computer and open a iTunes .

After that you can locate a iPad on the left side of the screen and click to the "device" menu .

Then right click on the name of iPad and click to the recover files and select a summary option which is inside a dialog box .

After that place a check mark next to the "Encrypt iPad Backup".

Now you have to enter a password and click to the set Password .

Then plug your iPad into Computer and choose a 'edit" option .

Now you can recover deleted files from Apple iPad.

Yes, just plug in the iPhone into the computer via USB that you have the iTunes on and you sync it by clicking "sync" and a message will pop up asking if you want to transfer your purchases to your library and at that point you click "yes".

Though iPhone uses quite a different storage mechanism, still you can recover deleted or lost data (such as text messages, voice mail, contacts, photos etc) with a third party specific iPhone data recovery software called Tenorshare iPhone Data Recovery. I used it to recover deleted voice mails from iPhone 4s and it worked.
You can give it a shot! Download it from http://www.any-data-recovery.com/product/iphone-data-recovery.html

Here is a tutorial to guide you recover your voice mails:
How to Recover Deleted Files from iPhone
Good luck!