Smartphone Stackmat Signals

I've been going around plugging stackmats into every smartphone I can get my hands on. I created this page to keep track of the signals I've recorded.


You need a special adapter to plug into the microphone wire of smartphones's headset jack. I use something like this. Some smartphones need to be "tricked" into reading from the microphone line by adding a resistor between the microphone and the ground. This is something all iPhones do. I don't know why. See this page for more information.

If you want more details about why phones do this, and how to work around it, please see my blog post on the subject of smartphones and stackmats.

Data (YAML)

Phone Signal Note Courtesy of
Asus Fonepad K004


Asus Zenfone 6

Benjamin Chu

Galaxy Nexus

Jeremy Fleischman

iPhone 3GS

Kevin Heiken

Motorola Droid 1

Devin Corr-Robinett

Motorola Admiral XT603


Motorola RAZR XT910


Nexus 4

Armin Askari

Nexus 5

Jeremy Fleischman

Nexus S


Samsung Galaxy Chat


Samsung Galaxy S3

Steven Xu

Samsung Galaxy S4

Harris Karsch

Samsung Note Tablet

Alan Chang

T-Mobile myTouch 4G

Will not turn off built in microphone, a la iPhone.


Galaxy Tab 3 10.1

Will not turn off built in microphone, a la iPhone.


HTC Desire-Z

Mingyuan Zhang (张铭源)

LG Optimus L5 II E460

Works with DCTimer!

Balogh Zsófia

LG L65 D280

António Gomes

Wiko Rainbow

Works with DCTimer! Required SoundAbout to force use of the microphone. Demo video1, video2.

Harry Smith

Fire HD 6

Jeremy Fleischman

Motorola Moto X Gen 2
Samsung Galaxy Note 4
Nexus 6