There's plenty of sensors --and opportunities-- for less than $10.
- Qualcomm® Snapdragon™ 1.2 GHz Dual-Core MSM8610
- 1.9 GHz CDMA PCS, 800 MHz CDMA
- 65K Color TFT, 480 x 320 pixels, 3.8" (HVGA)
- 1,540 mAh / 7hours talk - 9day stand by
- microSD 4Gb (included) -- up to 32Gb
- 3MP Rear-Facing Fixed Focus Camera with Flash and WVGA Camcorder
- Accelerometer
- 802.11 b/g/n
- Bluetooth 4.0
- GPS
I'd like of another sensors not listed there; like light, proximity, or magnetic .. maybe anyone with the phone can confirm?