My Galaxy S3's Volume button was sticky just out of the box. Only problem was I had to post it to UK for warranty which could have cost me about 20 USD. So when I searched youtube I found a video demonstrating how to Disassemble the galaxy S3. So I went ahead
1- Power off the device
2- Remove the Back cover
3- Remove the battery
4- Remove the micro sim and the SD card
5- Remove all the small screws execpt the one in the top most part of the phone.
6- Now take off the plastic piece which will expose the volume rocker area.
7- Now take out the volume rocker as shown in the video.
8- Now slowly re-insert the voume rocker as shown in the re assembly part of the video.
9- Now your volume rocker should be working fine.
10- If it is still sticky you can take it out again and re-insert it again. If it is still sticky inspect the volume rocker for any damage, if so you might have to order a new volume rocker. It is available in Ebay for 5.90 USD. search ebay for ' Volume side button Samsung Galaxy S3 GT i9300'
11- Put back the plastic cover in place, which will clip back in to a good fit.
12- Now put the screws back.
13- re insert the sim and the sd card.
14- put back the batter and the back cover.
For the you tube video go to you tube and search for
'' Samsung Galaxy S3 Disassembly & Assembly - Drop Test Repair''
or you can type this URL remember to remove the extra spaces from this url
http : // youtu . be / eo93EF7rVIw
you can email me on
cerebrum3@yahoo.com for any further assistance