Recommended minimum SNR (dB) for wireless data applications?

A Signal-to-Noise Ratio (SNR) of 20 dB is generally considered the minimum recommended for reliable wireless data applications. This level provides a good balance between signal strength and background noise, allowing for stable connections and acceptable data rates. While 25 dB would offer even better performance, 20 dB is the practical minimum for most enterprise environments. 15 dB is often too low, leading to frequent retransmissions and slower speeds, while 10 dB is typically insufficient for any consistent data transfer, resulting in very poor performance or disconnections.