Silicon sensors (which is what you'll get in all visible-light cameras as far as I know) are all very sensitive to near-IR. Their peak sensitivity is around 900nm. The difference between cameras that can see or not see IR is the quality of their anti-IR filter.
Your Samsung phone probably has the green filter of its bayer matrix that blocks IR better than the blue and red ones.
Here's a random spectral sensitivity for a silicon sensor:
Your Samsung phone probably has the green filter of its bayer matrix that blocks IR better than the blue and red ones.
Here's a random spectral sensitivity for a silicon sensor:
https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcRkffHX...