11. Belkin EaseFit Plus Armband - £18/AU$30/US$25
If you want to take your S3 to the gym or out for a run, this comfortable and lightweight armband will hold your handset in place and has a pouch big enough to keep a key or some cash. Most importantly, it's water-resistant and hand-washable so you can keep it fresh for the next sweaty workout.
12. Tech21 Impact Snap - £19/US$31 (around AU$30)
Providing a military-grade shield for your S3, the shock-absorbing D30 material - which has been used in armour by the US Ministry of Defence - should provide a suitably tough exterior. There's access to all ports, including the speaker grille, while the rear-facing camera is free to fire off as well.
13. Overboard Pro-Sports Waterproof Arm Pack - £22.50/AU$30/US$36.50
Beach and swim-friendly, Overboard's Slide Seal System keeps water firmly away from your smartphone and even has enough room for money and keys. The waterproof design has also been built to float on water and will keep sand, dust and dirt at bay.
14. Urban Armour Outland - US$35 (around £22.50/AU$34)
This case looks like it can take a knock or two, and the tough armour shell complemented by an impact-resistant soft core should provide serious protection from all angles. Oversized buttons add extra durability, and a screen protector will combat scratches, with a raised bumper helping out when the smartphone is lying flat.
15. Case-Mate Pop! Case with Stand - £23/US$35 (around AU$34)
Hiding away a built-in stand, the Pop enables you to watch video on that vibrant display in portrait and landscape mode. Covering the back and corners of your S3, the plastic and soft rubber shell provides impact-resistant protection even when you have left your smartphone lying on the table.
16. Speck PixelSkin HD - £25/AU$29/US$30
This light, polymer-built case hugs your handset and shows off a matt and glossy pixel finish that will make the back of your smartphone look a bit like a minesweeper board. A raised bezel will help keep the screen out of harm when lying flat, while rubberised button covers should add another layer of protection.
17. Case-Mate Tough - £25/US$35 (around AU$34)
The clue is in the name - this hard shell case is all about keeping your S3 in one piece using a silicone inner and durable polycarbonate shell to sure up the defence and make it easier to keep hold of. If you are a heavy-handed phone user or like to take your phone hiking, this case is designed for you.
18. Samsung Galaxy S3 Flip Case - £25/AU$35/US$40
This official Samsung case comes in an array of colours and replaces the battery cover and guards the AMOLED display against scratches and dirt. By covering the whole of the front, it stops you from accidentally pressing buttons or swiping, and with an NFC chip built in, it means you can still share images and videos by tapping it against another S3.
19. ElementCase Atom - US$45 (around £29/AU$44)
Made up of a polymer and carbon fibre backplate, the Atom also sports rugged, robust corners to absorb impact and make it more comfortable to hold. Buttons are moulded over and integrated into the case, while a speaker port means the sweet S3 sound doesn't get trapped.
20. Otterbox Defender Series - US$50 (around £32/AU$48.50)
Offering a triple layer of S3 protection, the Defender wraps itself around the handset and guards against bumps and drops with the combination of a polycarbonate shell, an impact-resistant silicone inner cover and a screen protector up front. There's also a belt holster if you want to free up some pocket space.
21. Proporta Barbour Quilted collection - £40/US$55 (around AU$53)
The iconic British clothing line Barbour has teamed up with Proporta for this stylish S3 case offering that is made from soft quilted material and leather and features an internal slot to hide away cards. Aside from its waxed jacket looks, the case will still protect your expensive investment and give you access to charge, turn up the volume or use the camera.
22. Incipio OffGrid - US$70 (around £45/AU$68)
Providing some back-up juice for your Samsung smartphone, the 2,000mAh charging capacity of this case will bump up the phone's power, with a row of LED lights notifying you how much battery you have left. Clipping onto the back and bumper, the OffGrid is made from Plextonium to fend off dents and scratches to the body, and is housed in surprisingly slim body.
23. Pong - £56/US$60 (around AU$58)
If smartphone radiation is a concern, this snap-on case has been designed with an antenna system to deflect radiation away from your head when you are chatting. But that's not the only trick up its sleeve. It can also increase talk time battery life, improve signal strength and won't get in the way of any NFC transactions.
24. Mophie Juice Pack - £80/US$100 (around AU$97)
A slim solution to make sure the S3 makes it through the day, the 2,300mAh capacity case will deliver an extra 32 hours of audio or nine hours of web browsing. It can charge both smartphone and case at the same time, with LED notification lights displaying progress. Plus NFC and S-Beam support means you can still enjoy one-touch sharing.