Google cardboard is VR headset build from cardboard. This may sound strange but it’s true, while companies like Oculus, Samsung, HTC, etc. are making expensive headsets with premium material, Google taught out-of-the box and introduced this simplest yet effective piece of tech. Google cardboard is piece of cardboard cut in a shape which can be folded and assembled as a complete headset. Google Cardboard is great but as it is built from only cardboard with some lenses, so for functionality it uses the sensors of the phone you pair it with. Google Cardboard compatible phones requires a gyroscope and Android version 4.1+ or iOS version 8.0+.

Tested list of Google Cardboard Compatible Phones

Phones:

HTC One X

Huawei Ascend P1

Google Nexus 5

Huawei Ascend X (U9000)

Huawei Honor (U8860)

iPhone 5, 6+,7

Amazon fire

Droid Maxx/Ultra

Droid turbo.

Honor 6 (But the magnet has to be on the other side.)

OPPO Find 7

Samsung Galaxy S II (i9100)

Samsung Galaxy S III (i9300)

Samsung Galaxy S4

Samsung galaxy S5

HTC Sensation

HTC Sensation XL

HTC Evo 3D

HTC One S

LG g3 works, (but you need to put 2 pads on the cardboard to elevate the phone. Or the magnet doesn’t work)

LG Nitro HD (P930)

LG/Google Nexus 4

LG/Google Nexus 5

LG Optimus 2x (P990)

LG Optimus 3D (P920)

LG Optimus Black (P970)

OnePlus One

OnePlus Two

OnePlus Three

Samsung Galaxy S6 Edge is fully functional

Samsung Galaxy R (i9103)

LG Optimus G

Motorola Moto G 2014 (works with mixed results, need second opinion)

Motorola Moto X 2014

Nexus 7 (2012)

Samsung Galaxy Note 2, Note 3, Note 4

Sony Xperia P (LT22i)

Sony Xperia S (LT26i)

Samsung Google Nexus S (i9020)

Samsung Galaxy Nexus (i9250)

Samsung Galaxy Note (n7000)

Sony Xperia Z3 Compact

Tablets:

Acer Iconia Tab A100 (7″)

Acer Iconia Tab A500 (10.1″)

Asus Eee Pad Transformer (TF101)

Asus Eee Pad Transformer Prime (TF201)

Samsung Galaxy Tab 10.1 (p7100)

Sony Tablet P

Sony Tablet S

Motorola Xoom (mz604)

Samsung Galaxy Tab (p1000)

Samsung Galaxy Tab 7 plus (p6200)

Toshiba Thrive 7″

Toshiba Trhive 10″

NOTE: More phones are there which are compatible with Google Cardboard, this list shows the ones which have been tested.
Source: Reddit

How to Check if your smartphone supports VR

You don’t need to buy a VR headset to check whether you phone supports VR or not. You can easily check this by going to Google Play Store, search for any VR apps and install it. After installation run the app and you’ll see two screens. Now run any media from the app and move your phone left/right, backward/forward, if the screens also move in such directions then your phone is VR compatible or I am sorry it is not.

or you can easily scroll up and check out the list of Google Cardboard Compatible Phones.

Google Cardboard Required Accessories

• Google Cardboard box
• 2x 40mm focal distance lense
• Velcro, rubber band & magnets
• Smartphone from the above list

You can purchase these stuff from any supermarket and get the cardboard from official Google store for only 10-15 dollars.

Requirements for using Cardboard: