You can configure your Android smartphone to automatically disable WiFi when it goes into sleep mode. The procedure is as follows:
-Go to Settings > WiFi.
-Tap on the Menu key > Advanced.
-Tap on Keep Wi-Fi on during sleep and select Never.
Jean-François Pillou - Founder of CCM Better known as Jeff, Jean-François Pillou is the founder of CommentCaMarche.net. He is also CEO of CCM Benchmark and digital director at the Figaro Group.