My Android phone was turning the Wi-Fi off when the screen was sleeping, ie turned off.
Looking at the network icons at the top right of the display, when clicking the phone back on from sleep, I observed the 3G icon on and no Wi-Fi icon. This was indicating that whilst the screen was in sleep mode although the Wi-Fi was available it was switching to 3G mode, turning off the Wi-Fi.
The network consumption of the phone was also reflecting the Wi-Fi.
A setting change can correct the issue, ensuring that the Wi-Fi stays on whilst the screen is in sleep mode.
- Open the Android settings page
- Click on Wireless & networks
- Click on Wi-Fi settings
- Press the Menu key. This is one of the three dedicated keys, or a software equivalent.
- Select Advanced
- Click on Wi-Fi sleep policy
- A pop-up window will show 3 options. Select either never or Never when plugged in.
