Simply leave your phone in the location and send an SMS message with the keyword "turnonrecording".
There will be no incoming SMS notification and the audio recording will begin for 1 minute.
The full version allows more recording time. Other incoming sms messages will behave normally. The file will be placed on the sdcard in the directory smsaudio.
The filename will be prefixed with smsaudio.
Tested on Htc Evo and Evo 3d
In the event you do not have an extra phone, you can use http://www.tekosoft.com/Smsauto.aspx that allows you to sms messages to phone.
If you have any questions or Feedback please direct to: